That's a good analogy. You go, enjoy that different body and mind, and return happy and sated for a while. Two people have had a good time and nobody was hurt.
I worked in the car business for many tears and this kind of thing does happen . It's not all about the money !
I think age can have to do with this in a way. For example I’m in my 30’s and obviously there was nothing like Tinder when I was younger and casual sex in general wasn’t as accepted as it is now. You can be as happy as you can get but a part of you will always wonder what it would be like to experience what things are like now.
I think it's completely normal. Maybe it's just getting more of what you like but I really think that more often it's curiosity in getting different sex. The thrill of being with someone different who wants to be intimate with you. The thrill of seeing them intimately or knowing that they'll see you intimately. How does their body feel....all that. Wanting it and getting it isn't abnormal. Neither is looking for an outlet that doesn't require a lot of overhead. But everyone is different. Makes the world go around.