too much curvature?

okay so my boyfriends penis is like, awkwardly curved? I don't know how to say this. but he thinks it's because he wore tight underwear through his childhood/puberty years. but yeah, I'm talking like, it's almost a 50 degree angle downwards. and when he gets hard it just stiffens, it doesn't straighten out. he's super selfcounsious about it, and idk what I could say/do to help him. can anyone think of an idea??