on toning muscles that you didn't know existed

post-exercise these days i find myself flexing and feeling might proud that, aside from losing a few extra pounds, i now have some real physical strength to be reckoned with and i'm not playin'. . .my younger brother (not little :) actually thinks it's weird that i go to the gym everyday. i didn't follow him up on that at the time, but i'm wondering where he was coming from when he said that. is going to the gym on a daily basis not a girlie thing to do?!?!