In hocd, does the anus straight man/teen erect after seeing or touching a attractive body of same gender??

I don't understand: I don't really understand your question. If you are asking whether you can react physically with an erection when you see an attractive male- yes. That doesn't mean that you want to have a relationship with them, any more than having an erection in response to an attractive female. You choose whether or not you wish to get to know the person.