I've always thought it would be hot to have a 3-some with twins or even brothers.
As for the genetics, I am bi and have a son who is gay. So, yeah, I definitly believe there is a genetic connection.
And before someone asks, no, I've never done it with my son. He doesn't know I am bi. But it turns out we have both got it on, at different times, with a fuck buddy of mine
