Ive never lost control wanking. Sure, i can cum quic if i want, but ive always been able to no blow if i didnt want to (to a point).
Sex is a different story.
Similar first time story as already posted. I was rubbing my cockhead on the outside of her pussy, spreading the lube a bit.....thought i was all good, slipped my head in and just shot off. there was no hiding it....i was spasming like i was having a fit and the load running out was also a give away lol.