a lot of guys do during adolescence - we largely never bring it up though.  my best friend was taught how to masturbate by one of his other friends at the time.  im 19 in college dnd my roommate & i masturbate to porn sometimes & most dudes i know do the same thing w/ their bros or roommates etc.   my gf told me not too long ago at a party that her & her 2 best friends had just gone down on each other while in the bathroom at the party. apparently these are very normal things for both guys n girls to do @ any time in their lives.  i have fun w/ it, don't let it label or classify me, and it kinda adds a little something in addition to having sex w/ my gf.    you are what you want to be.  be whatever makes you feel the best & happiest. or you may miss out on this short life's most rewarding things!