I am 18 and i have a friend how is always touching his dick and lately i have been wondering how mine compares to his. I don't know how to go about doing this. I know there is already forms about this but i have some more issues. I am fine to show him mine but i am embraced. I do know his is perfectly straight when erect and mine is not. Also, whenever i am naked in front of people, girls or boys, i get a big old hard one. I just get reminded of sex. How to i stop the erection? I am not gay and i don't want him thinking i am.