I found this one really tough, and I have never heard it before. I also had trouble coming up with examples from personal experience. I thought of learning to ski-putting in the time, falling and humiliating yourself, then gaining ability and being able to rush down a mountain at high speed, but it's easy to love that sensation. When I was young I used to wash dishes in a restaurant. Boy did I hate that. As I got more adept at it, when the restaurant was crowded, I did sometimes enjoy the rhythm of the kitchen, and me loading and unloading the dishwasher through the steam, while occasionally washing a pot. I enjoyed the skill and smoothness of my rhythm. But then I would think I'm just a masochist.