I can have a conversation with my neighbor, can't have sex with them though, I wonder why that'd be frowned upon? Maybe it's because your comparing something we pick up as second nature to something that's passed around as being special and important, and even scary and dangerous to some, the logic that sex is like a conversation or coffee is crazy, someone can't hold you down and force conversation on you or coffee down your throat, all I'm saying is if your partner is ll, maybe just maybe it's because when they where growing up they where taught to not speak unless spoken to, aka you don't have to start it because everyone else is willing to.