Here's an interesting one: kissing a gay guy on the cheek, or letting him kiss you on the cheek is neutral, as long as the guy is out of the closet. Hugging and/or kissing a straight guy is gay.
Omg, a King Missile reference in the wild, how wild!!
And yes, discussing straight sex with the same sex person is gay, I've alloys felt that (still nothing wrong with that ... well, apart from when the ultra-tryhardwannabe-alpha males do it, ugh, just kiss already and the the charade).