Well actually its pretty hard to determine if the shirt is actually gay or not. I'm not an expert, but i dont think clothing has a sexual preference. He could be bi so the shirt would be half gay and half straight (therefore not all gay). He could also just be straight so the shirt would be directed at women and in the case the shirt would not be gay unless gay to you is a woman sucking a man's penis. If he is gay and likes boys sucking his johnson then the shirt might be gay but I would try and ask the shirt what its orientation is before assuming. We all know that assuming makes an ass out of u and me. but mostly you.