Yeap, i think its rather dumb/disrespectful of him to do
that.
I mean, its normal to ask these questions if you're out with
friends, its normal to be nervous as well. But asking a gf that is
quite insensitive.
Girl, you're not in the wrong. Its him who's being an insensitive
jerk. Maybe you could dress up nicer so that he won't look at chio
bu's anymore, just at you.
Best thing is to talk it out with him, and say you don't feel good
about what he did lor, and hope he understands.