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27 votes
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How many times a week is masturbating good for health?

Let's get a few things out of the way... Sex is normal (1). Sexual desire and arousal are normal (2). Asexuality is normal (3). Masturbation is normal (4),(5). There is no problem whatsoever with ...
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17 votes
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How long will it take to show the signs of pregnancy after intercourse

Assuming pregnancy takes place, the only reliable sign that a woman is pregnant is cessation of her menstrual period. If she's late, urine tests are a reliable way to confirm pregnancy, especially if ...
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9 votes
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What influences vaginal odor?

This is an interesting question, which comes frequently on Health SE. First, here a small background on vaginal secretions: More than 30 compounds have been described in the vaginal secretions. ...
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9 votes
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What forms of prevention of STIs are there?

The CDC lists two: complete abstinence, and being in a long-term mutually monogamous relationship with an uninfected partner. Sexual intercourse naturally introduces microtears (small tears in the ...
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  • 746
9 votes

How much body fluid required to actually transmit a sexually transmitted disease (STD)?

To get even close to how much bacteria there are in vaginal discharge and penile discharge, we look at how are they diagnosed/detected laboratory wise. Gonorrhea is caused by Neisseria gonorrhea a ...
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8 votes
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Vibrator side effects

The literature regarding the use of sex toys in women is sparse. I have found two studies, which describe potential side effects related to the use of sex toys in women: Transmission of sexual ...
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8 votes
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Is biking linked to erection- or fertility problems?

A decade ago, a study (1) reviewed the evidence regarding the effect of cycling on impotence (due for example to pudendal nerve entrapment) and the effect of repeated scrotal temperature on ...
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8 votes

How many times a week is masturbating good for health?

Since you have not been rendered blind, you can follow this link which states that it is not intrinsically unhealthy unless it starts to interfere with the way you function socially or at work. In ...
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8 votes
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How soon can you know if you will have twins, triplets and can one increase this chance?

First of all, just to be clear: IVF-associated twinning and “tripletting” are most commonly of the dizygotic (“fraternal”) variety. You appear to be asking about monozygotic (“identical”) twinning ...
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  • 4,355
8 votes

How to get rid of erectile dysfunction?

Before going directly into the topic, firstly, it is necessary to comprehend the mechanism of erection, because small fault due to different factors in the mechanism gives rise to its dysfunction. ...
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7 votes
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Risks of having an unwanted child - worrying as a man

She had two periods afterwards so she is not pregnant. Who are you to demand that she take a test? You pretty much called her a liar when you did that. If you can't or won't accept her at her word ...
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  • 9,345
6 votes

Cases of pregnancy due to pre-seminal fluid

This article should give an idea of the likelihood of pregnancy based on the number of sperm available. If you look at the graph of the Probability of Conception vs. the Sperm Concentration, it shows ...
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6 votes
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How does HIV infect people?

You can only get HIV from someone or something already infected. This includes humans, needles, breast milk, etc. HIV virus must come in contact with a damaged or open tissue. CDC.gov You can get ...
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  • 2,952
6 votes

Having sex with someone who's had many sexual partners,

This is a very good and important question, not only for you but for other people as well. As people have said in the comments, YES it can be potentially dangerous to have unprotected sexual ...
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6 votes

What is the life expectancy of a sperm in dried semen?

There's no need to worry. Getting pregnant isn't that easy.1 It's unlikely that sperm survive for 2 hours. On a dry surface, such as clothing or bedding, sperm are dead by the time the semen has ...
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  • 6,594
6 votes
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Is ShockWave Therapy Useful For ED or not?

The results of our studies, which also included a double-blind randomized control trial, confirm that LI-ESWT generates a significant clinical improvement of erectile function and a significant ...
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6 votes
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Are contraception effectiveness percentages per-user or per-use?

Neither. The percentages given are the percentage of couples using that method who will conceive over a year. So if 100 people use that 98% method, 2 will get pregnant each year. Here is a page ...
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5 votes

What STDs can be transmitted if both parties have no open sores/cuts?

This answer covers herpes, with both HSV1 (usually appearing and transmitted orally) and HSV2 (usually called genital herpes). So-called "asymptomatic shedding", when the virus can be transmitted ...
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  • 6,998
5 votes

What's with anal sex and HIV?

Yes, anal sex is the most risky method of sex with the highest possible chances for HIV infection. This is clearly said in the official Centers for Disease Control and Prevention website: Anal sex ...
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5 votes
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Are there reasons why fertility awareness methods of family planning are not widely promoted?

Fertility awareness methods are slightly different from the others in that they require you to have self control and not have sex when you might otherwise want. Many people don't like to do this. In ...
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5 votes

How can someone that is HIV positive not be contagious?

Your back-of-the-envelope calculations seem to be off in estimating the extent of viral load reduction in a treated versus untreated person as well as the risk of transmission for unprotected, ...
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  • 12k
4 votes

HSV transmission

HSV1 and HSV2 are different strains of the Herpes simplex virus. They both can lead to oral or genital infection. The reason they are usually known as oral (HSV1) and genital (HSV2) herpes are that ...
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  • 6,998
4 votes

Hepatitis B transmission

The hepatitis B virus has been found in semen, salivia, and vaginal secretions (as well as in blood, of course). The risk of transmission is lower for oral sex than it is for vaginal or anal sex, but ...
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  • 6,998
4 votes

Does the pre-ejaculate of man contain sperm?

Sperm does not naturally exist in pre-cum since sperm is released at the point of ejaculation. However, both the articles you site are correct in that preexisting sperm already in the urethra could ...
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  • 151
4 votes

Is amyl nitrite used for sex?

Amyl Nitrite Treats and prevents chest pain (angina pectoris). And more pertinent for the question: On the street, this medicine and others like it are sometimes called "poppers." They have ...
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  • 2,952
4 votes
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Anorgasmia with SSRI and SNRI prescriptions

First of all, anorgasmia can be either a primary effect caused by depression itself, along with decreased libido. But then it may also be a side-effect of the medication itself, adding to the ...
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  • 6,747
4 votes

Lack of sex drive

See a doctor. Low libido (the medical term for sex drive) can have medical causes. Two examples among many potential causes are low testosterone or depression. Also Sex therapy (a type of couples ...
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  • 5,694
4 votes

Can low libido be a side-effect of schizoprenia medications?

Yes they can. Co-occurring conditions like depression may also contribute to low libido. This is a good article that discusses the details. The mechanisms by which antipsychotic drugs may cause ...
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4 votes
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Why is HIV singled out from other STIs?

This is a good question, and although as you correctly state that HIV is an STI (see STI vs STD vs Sexually Transmitted Virus?) there is a difference with HIV which is one reason why it may be ...
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  • 5,872
4 votes

Why is HIV singled out from other STIs?

Question: If HIV is an STI, then why is HIV often listed separately, for example: HIV & Sexually Transmitted Infections Fact sheet STDs and HIV – CDC Fact Sheet What You Need To Know About the ...
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