Twin brother suggested what??

((This question is really for other twins or multiple idents and not just anybody.))

So let me admit that when we were growing up, my brother and I (idents) "played" with each other...like, a lot. We were always together and shared a room, but I already know from other twins that we've talked to that doing that isn't too unusual so that's not my question.

Anyway so we stopped doing it in college, and it's been about six years since it happened last time. Now we live about an hour apart and don't see each other as much as we want. At our mom's for Mother's Day, he was drinking and started suggesting we do it again sometime or have a 3way with his girlfriend. I laughed it off but I know he wasn't joking about it. Neither of us is gay (I don't think), and I'm not sure where this is coming from.

Other idents: have you had to deal with this before?

I don't know if it's a phase, loneliness, the beer talking, or what. We're going to talk but I wanted to get a sense of how "normal" this kind of thing was beyond just teen experimentation.

(Please spare us the whole "incest" thing, we never had full on sex and I can't change the past anyway.)