I had something similar happen when I ran an online game a long time ago. I created an alternate incognito character so I could just hang around and observe stuff. So I made a female character. Suddenly it was obvious I was treated differently. People followed me, gave me stuff, etc. No major insults, since our game tolerated none of that at any time (it was run by adults, not not by kids in adult bodies). It really got creepy. And the only thing female about it was the name, as it was a text-only game. I noticed over the years that any time I had a female character in a game that it was treated differently, being told "you're cute" or "why'd you make your character so ugly?".
I noticed this in one of my male friends too (who is just too flirty at times). In a game he'll be really chatty with any female character but mostly ignore the male characters. At one time the first thing he asked a female character who joined our group what her story was. She asked what he meant, and he said "you know, like are you a student, where are you from, that sort of thing". She sort of deflected it, but it was odd that he never did that sort of thing to anyone but female characters. I mentioned to him that it seemed really creepy to me, and he was very defensive saying "I was just trying to be nice". It's like he was treating the game as his dating pool or something.