Is it rude for a complete stranger to ask you about your sexuality? I mean I would never bcuz sometimes it's obvious and besides I wouldn't be interested anyway. Still I have witness on numerous occasions when a stranger would walk up to a guy and ask the guy if he was gay or not. If you're a gay guy would you be offended by this particular question?
I would say no if you had intentions of coming onto them. Like if you had a conversation and things were going well and for some reason ur gaydar was off that day.
If you're flat out asking in front of a group of people because the person displays "gay" mannerisms, then u rude