I'm all for it. I will sometimes pull my shirt off and flex in the mirror. I thought it was becouse I am a narcissistic and shameless show off. I'll have to look up narcissistic (I forgot what it means) but shameless at the gym, sure. I mean we go there sweat, puke, and I have herd a fart (don't know if it was me
) why not flex, after all we are there to workout. But it's not just flexing, I try to stand up straight, control my breathing. I belive how we carry ourselves can be an improvment exercise so get in that mirror forget about what anyone else thinks and strike a pose.