"Are you gay?" or "I hope I'm not going to offend you, but..."
I love talking about sexuality and my experiences, and hearing about other people's reality and way of thinking, their opinions and feelings - but I only like all this when the people are open to discussion and or interested - so I never bring any of it up.
It's both my favourite, and I wish people would ask it more.
Fav answer (that I give, since I don't generally ask other people) - "yeah, I'm a flaming homo" (though I usually say something boring like.. 'yes.')
- and - "Sure, no worries, ask or say anything ~ "
Why - because it informs and opens up to interesting things, anthropological studies, and sharing - perhaps educating and enlightening.