My first time LOL...Was pretty funny I just turned 12 I believe and I was laying down in my bed.. And I felt it coming and I looked around for a towel or something and I was like OH MY GOD!! I'm gonna go everywhere!! Lol...So I stopped and tried next day and it felt soooooo good.. Have you ever been laying down on a couch or something face down with a hard-on? Thinking about something that turns you on? and your penis is 'stretching' I call it
and it feels good? It kinda feels like that but better. I hope that helps.