@Noname1987, if you want to learn more about this, it's called candaulism. Which is a sexual fetish involving exhibitionism of one's wife. Here's an article on it for you.

Kinda Cucks: The Men Who Want to Know How You‘d Have Sex with Their Wives | MEL Magazine

I would be very careful around this because he could end up taking innocent naked photos of you and sharing them without you knowing it. It seems as though he's pretty far into this fetish, wanting to involve your gynocologist, a massage therapist, and his close friends even.