I don't know if I'm the only man that does this (I'm probably not), but sometimes when I get myself off I simply use my index finger to rub the underside of the head. There's a lot of nerves there and it's a very intense sensation. So I'm basically masturbating using one finger. Does anyone else do this?
I always stroke some times during a session. But there are times when I finish by touching rather than stroking or by vibrator. One approach is to put my thumb along top of the glans, at 12 o'clock, (finger nail pointing at belly), two index and ring fingers at 5 and 7 o'clock and rocking my hand.
It's called a frenulum orgasm. I've done it, but it's difficult to give into the temptation to just grab my cock with my hand and go to town. Here's a good description of the process: https://www.orgasmicguy.com/most-intense-male-masturbation-technique-3-tickling-the-frenulum/