I think it finally happened..

Gwen
As a teenager I became sexually active at a pretty young at (14) and have only been with 3 men since then (now 21). Recently I've been seeing a lad that just gets me, and everything he does is magic. For no particular reason and with very minimal foreplay on Sunday we had sex and the one thing I thought would NEVER happen to me (as it hadn't happened yet) HAPPENED. I actually had an orgasm from penetration. 
Now maybe this is ridiculous but I never had, and I worry that if I tell him to do whatever he did like that all the time he will feel like less than for not making it happen sooner in that way. What could it have been?!?