What do i do about stretch marks?

Now first off, IM A GUY. ive looked at so many questions on this site and almost everyone is about a girl. I'm 14 and have them only cuz im growin fast (6'2). Not fat, but not a stick either. I know how to prevent them n stuff. but how do u reduce them. I really only have them on my back. I know about coca butter. Is that the best way? Any ways you know please tell. Also is it different 4 guys n girls