Ruined Orgasms
You give your man a handjob. You get him very close to coming. Then you let go. If all goes well, his erect penis will twitch and ejaculate. If he’s not quite ready, stroke him some more and let go. Repeat as necessary.
You get to enjoy what appears to be a male orgasm. He, on the other hand, will feel frustrated that you didn’t stroke him to completion.