I think I need to preface this by noting that on the face of it, this may sound odd. However, there exist a plethora of irrelevant results any time I've searched for this, due to the nature of the related keywords, and I don't have access to any medical databases to help me avoid the dross.
So. I'm an engineer by trade and I had a thought about a health product which I think could improve a lot of lives. I'm still in the concept stage and I'm looking into the feasibility of what would be required, from a technical perspective, for this product to function as-intended. Basically I am attempting to ballpark the specifications so I can bound the scope of the problem.
In order to do this, it would be exceptionally helpful if I could find numeric data regarding "typical" forces/pressures produced by human genitalia over time and/or under different conditions. I.e., durometer-equivalent measurement of penile stiffness vs. time and vaginal radial contraction pressure vs. time (and vs. position would be best, but those data may be challenging to obtain from an instrumentation perspective.)
So the question is this: might such data exist somewhere? Perhaps in some esoteric journal on human sexuality that might not be well-known outside that field? Or is it not likely to exist?
I might be able to develop instrumentation to estimate these data if they do not exist, but I fear that it may strain my relationship with my partner to request that she use said instrumentation... not to mention that it'd take a while to figure out how to keep the instrumentation relatively inexpensively while still medically safe to use.
My gut tells me these aspects of sexuality have been quantified, because many stranger things were quantified back in the 70's-90's, but I haven't been able to find anything about it on my own.