Male problem please help I don't no what's going on?

Basically i am a 17 year old male. I am currently going through puberty like everyone else. Most of the changes have occurred. I am 6'2" and pretty hairy. Anyway. I have never masturbated. I have tried but it doesn't feel good so I have no reason to do it. I can become erect, just from stimulation but after that nothing happenes. I don't no why i can't make myself *** or why touching my penis doesn't feel good. It doesnt feel bad, its kinda just like touching it. Anyway I no I have the capability to *** because I have had wet dreams since about age 14 or so. Does anyone no why it doesn't feel good and I can't get myself to ***? I'm trying to figure this out please help. If u need Anymore info about me ask.