Long ago I dated a woman who'd had a spinal injury that made it extremely easy for her to orgasm over and over again. It had healed some, so she didn't have spontaneous orgasms in public anymore, but she could cum again and again with maybe 20 seconds between each one, for hours on end. It was... interesting. She had fun!
I had a FB like that once. Every time I saw her she seemed to get more orgasmic. The last few times I saw her, she came on almost every stroke. She would only stop when she was completely exhausted. Truly insatiable!