Not since seventh grade. That was only because the guy punched my sister, so of course I was going to kick his ass. Since then though, most people I know don't get into fights.
Yes, up until the age of 11 I had a tonne of fights, I haven't since. This one guy tried me when I was 9 and he was 11, he hit me first and it didn't even hurt so I punched him as hard as I could and then he ran home crying, he got a black eye and never spoke to me again.
i always win fist fights, so..
I've punched a girl once when I was 11 because she was nasty, a real bully, one of those shady girls you think are nice and innocent by their looks but really are shady and mean. she stopped then and never even told a supervisor.
(i'm female, by the way )