Topic drift...
My wife really enjoys spanking and light impact play generally. She describes it as "thuddy" and like a deep, intense massage.
One of my play partners enjoyed choking. She believed it was because when she was young and learning about sex, one of her partners inadvertently pinned cord around her neck shortly before orgasm, and she found the loss of air added to the intensity of experience. Of course, she also enjoyed all manner of rough play, some of which I was ok with and some of which was beyond my comfort zone. We actually had a very long online chat discussion about likes, dislikes, and soft and hard limits... "So, when you say you like being slapped, what does that mean?" ... hell of a discussion but very, very valuable.
It's always the quiet ones.
Actually, speaking as a quiet guy with an outgoing wife and a kinky side, there is probably some truth behind that joke. We can hide a lot behind that quiet face and, more, when we let go and open up sometimes it's too far and too fast. Not excusing what he did by any means, just saying... us quiet guys are sometimes hiding things, sometimes even from ourselves.