Reminds me of a story. Because of business travel I hadn't been able to arrange a blow or handjob in several weeks. In fact, I hadn't even gotten off in a month at least. When things settled down I arranged a blow from a guy who'd done it a few times before.
As soon as I was in his mouth I knew this wasn't going to take long. I was already halfway there. I encouraged him to go slow. So at one point he's holding my boner straight up and down with one hand and idly rubbing the frenulum with his thumb...while he sucked on my ballsack. This seemed like a sensible clock extender.
But then bang I felt my orgasm nerve twitch. Having my testicles tongue-washed in his mouth one after the other, coupled with a fren massage and I was ready to blow. "Holy fuck I'm going to cum!" I said. He eased up and... I didn't.
I think I said I'm going to cum five more times before I actually did. Each time I was certain I would, but somehow didn't. But when I finally did it was incredibly intense. I think he had baby batter coming out of his ears by the time I stopped squirting.