How Would I Break Into Gay Porn?

For modeling of any kind good shape and muscular, toned, or lean builds are definitely a plus. There are so many sites which require you to first post your pictures through their websites for approval. I am listing few of them after some research: www.lucasentertainment.com
& chiseledmale.com
You need to post your pictures according to their requirements & wait for their approval. Best wishes for you.