Well you sure don't act like it so you should probably expect people to ask more often than not.
There are no known human men besides Sensei, and acting like a pervert doesn't automatically mean you've had sex. Usually tends to mean the opposite, in fact.
The second punchline was better than the first to me. I just can't imagine Furina taking a W like that. She's too much of a loser to successfully pull something like that off.
