I bet there'd be lots of volunteers to help with the research if it wasn't for the biting / slashing / trampeling risks inherent in the effort.
A few years back I read an article about captive breeding of Mexican timber wolves. Part of the challenge of artificial insemination is figuring out exactly when a she-wolf is ready, willing, and able. There's a maybe four day window, in the midst of the larger estrous cycle, when a lady canine's vagina is open for business. She won't / can't tolerate a male getting on top / going inside outside of the time. So, the workers in this study had to tranquilize the she-wolf and swab her every few days and then carefully study the skin cells. When the time is right they knock out a "guest stud" (not her usual mate, so she wouldn't let him approach), electro-stimulate the jizz out of him, and do the turkey baster thang.
So, there SOME practical knowledge of at least one species' lady bits.