The garter belt and panties is obviously a bit of a twist. Did you two already have a cross dressing thing going on, or did he introduce this in the context of gaining?
More generally, a lot of guys are thrilled to be able to turn a woman on with something specific. I mean we go ga-ga for boobs or butts or whatever, women can distract us with a flash of cleavage, etc. On the other hand on the flip side it often seems to be some mysterious gestalt that makes a woman attracted to a guy, and we seldom have that ability to just do something and rivet our partner's attention.
So even if he isn't into in terms of being turned on by gaining, he could be into it in terms of the rush and turn on of being able to turn you on.
8 years