Alright, I am also a virgin, i haven't really tried and I am unsure if i could change that if i tried, but anyway..

I think masturbaiting is done really fast, at least with me, so thats why i cum fast. I am guessing that if you go slower you cum slower, but if your getting laid you may cum right away...so my answer is it may just be the speed.

By the way, I love your profile now man.

peace.