Why do men never wear a bra?

Most of them have bigger than me, and they don't wear bras. Some have huge s, and very bad in shape - triangular and drooping down, - and they still do not wear a bra. Now, if they put these hanging triangles in bras with enhances, they would have looked so much better. If a woman with such huge, ugly triangular walked around without a bra, she'd been imprisoned already, but men, they go away with anything, why?