I've wondered that myself from time to time. When you have sex all day for work, do you still enjoy it in your off time? I've never really "enjoyed” my work, I basically just tolerate it, so l don't do anything like it in my off time. But if I did something enjoyable for work, like fucking hot chicks, would I still want to do that after hours, or would I need a break from that? Interesting. I'm trying to put that into perspective. Let's say I am a writer and I write novels for a living. I love writing and I've written dozens of books. Would I continue writing when I don't have to because I love it so much, or write other things when I'm not writing a novel? Maybe. So l guess the sex thing on and off the clock could be the same.