Football is more child abuse than ballet. Destroy your kids body before they understand the risks, and the incredible (ultimately) lack of reward for 99.99% of players. A few busted knees, shoulders, and a concussion or two, all just make 'em tougher right? All because you loved Friday Night Lights.
(Neither are actually child abuse but tackle football is far less responsible parenting IMO, if you're forced to rate it)
Nothing wrong with ballet for anyone. Plenty of hardcore men that are incredible dancers, including ballet.
Just so you know, you're around incredible dancing women, in skin tight clothing, holding them all the time, as you basically "work out" round the clock to tone and build strength (Throws, leaps, etc.), and proudly display your bulging crotch to slightly prudish but appreciative audience.
The thing is, ballet is a physical art. Your body look and your technique are on visual display. It's like body building, but looks beautiful rather than like you're constipated, and where you don't need to do steroids 24/7 to compete. On that note, Arnold Schwarzenegger took ballet to help him with bodybuilding, and it also helped him later with acting.
Christian Bale was a dancer early on. His first cool role in Equilibrium where he did the gun/pistol work, according to Bale the scene withe motorcycle helmet beat-down was able to be done in one glorious (for its time) take, in part because of his dance training (remembering numerous physical poses and sequence and executing them in a natural looking manner).
Christopher Walken was a ballet dancer.
Ballet dancers are ripped, can dance, get great cardio, and stay flexible. You could hardly do better for your kid in making them a more attractive to (any sex) man.