Go, Moo cow!!
Well, just to throw it all in an even further different light from Moo's, I beg to differ that I wouldn't like you playing any tackle game with the boys either - whether you were on my side or on the opposition; it is just not right or fair because guys, of course, don't really want to tackle girls. They like to play rough in these games, and tough, and they shouldn't have to be thrown around mentally, like that, by having to cope with a girl playing on the field - doesn't matter if she's better than the whole bang lot of them, guys will often want to play hard, and don't want to do that with a girl.