But there are the same sort of sweat glands in the groin as there are under the arms (the apocrine glands). I'm a woman. I have noticed, when I'm not having problems with BV or am on my period, that my crotch can smell just like my underarms. I shave neither. I wonder if that had something to do with it.

Nope!

I just watched this 15 minute video, not the shorter trailer other people are linking: