Some people don't want girls to play on 'boys sports teams' for fear that they will get hurt. This has not been proven because girls haven't been given the chance to play with the boys.
Allowing girls to play on the same sports teams together may build relationships that otherwise would not exist.
people may argue that girls are to fragile, which is simply not true. Women can be just as atheticly talented as males. Injuries happen to both girls and boys on combined and seperate