Firstly, I've always been relatively ok stamina wise when it comes to sex and usually have no issues with 15 mins of penetrative sex. When it comes to jerking though, I always just wanted to chase the orgasm and that high, so never took my time. I guess that compounded over time and I'm much much quicker when I'm jerking myself off or getting a hand job. I can easily make myself cum in a minute if I want to, usually a lot less if I'm hard and have been for a few minutes already.

I'd seen this sub before. I've jerked to some timed videos and beat the times. It was fun, and kind of hot. I didn't really think it was changing much as I could always make myself cum quick and it still wasn't negatively affecting sex.

Just last week though, while on holiday, something changed. My gf and I were lying on the bed, both naked (we had just come back up from the pool to cool down a little). I was super horny but she was dozing off falling asleep so I got on reddit and started browsing my usual subs. I was harder than ever, leaking precum almost straight away. I grabbed my cock a lot tighter than I usually would. I don't know why I did it but it felt good. I stroked up once, watching as more pre leaked out, and back down. Loosening my grip I gave it another slow, hard squeeze, and that's when it happened.

I immediately felt that feeling, and realised I was going to cum. I'd tried to relax and stop it as soon as I noticed but it was too late and I started to spurt cum. It was one of the biggest and thickest loads I've ever seen before (trying to catch it all in my hand to avoid a mess and it nearly overflowed), from ONE STROKE. I couldn't believe it. I didn't want my gf to turn round and see because I felt like it had been barely a minute. I only planning on some slow jerking to feel good without cumming and ended up blowing a load on the first stroke.

Now all I can think about is trying to repeat it, or even somehow best it and cum even quicker or with even less stimulation. I think that one orgasm has made me develop a definite prejac fetish...