I never thought of sex as fun, like riding on a roller coaster or watching a stand-up comedian.
No one ever smiles when they're anticipating sex, or laughs while doing it. Arousal and response is serious business.
I find all of these activities pleasurable: doing historical research, doing the laundry, studying languages, having dinner, jogging, watching tv, looking at bulges, reading, going to museums, buying books, listening to a lecture, sleeping, writing blog posts, holding conversations, sex, lecturing in front of a large crowd, lifting weights, playing "fetch" with dogs, hanging out in coffee shops.
But most of them aren't "fun."
If the theater and a movie are equally pleasurable, but theater tickets cost $40 and movie tickets cost $10, we will probably decide on the movie.
If a good restaurant is ten miles away, and a terrible restaurant is right next door, we will probably decide on the good restaurant.
Sex is relatively low cost: little risk of disease or victimization if you follow the right procedures, not very time consuming, and free.
(You can't count the time, money, and energy expended in trying to find the sex partner).
And it provides a great deal of pleasure of five types.
2. aesthetic (appreciating his physique)
3. emotional (making an emotional connection).
4. psychological (boosts our self-esteem).
5. social (gives us something to discuss with our friends).
Therefore the pleasure far outweighs the cost, making it one of our most preferred activities.
But I still can't say it's fun.
The x-rated version of this article, with nude photos, is on Tales of West Hollywood.