The fun part about having sex is the anticipation that one endures which leads up to sex, but the actual intercourse itself I would characterize as being categorically erotic, not fun.
For example, riding along in a car on a summer's day through the countryside when the notion of stopping the car to then run barefoot into a pasture field filled with long, tall grasses and far from the road to specifically have sexual intercourse when you find the perfect spot, is fun! It's totally laughable!
Lying down in the long, tall grass out of view from all civilization as we strip each other's clothes off while thinking that no one is watching from the road, is fun!
Having your partner then lie on top of you stark naked in the middle of a farmer's hay field, is fun because it's so unusual because we think we are hidden from view and nobody knows we're out there!
Finally convincing myself that a stray cow isn't going to suddenly show up in that same field to eat the hay exactly where we are both lying, is fun to worry about and is also stupid to even talk about which also makes the whole idea of being there so much fun!
Being convinced by my partner who's lying naked on top of me that everything will be okay and we won't go to jail for trespassing, is fun to speculate about especially if he's wrong, as we lye there wondering what we'll say to the Judge when he asks us why we were found naked while trespassing in a hay field?!
Where the line becomes crossed between 'fun' and 'erotic', is the moment when neither one of us care anymore if the cows are watching, nor if the cops show up, nor if the cow show up and stand there to watch our every move as my thighs voluntarily spread wide apart for my partner and I feel him slowly enter me as the image of the Judge and courtroom and the cows and the cops quickly fade from my mind's eye.
This is the transition point between 'fun' and 'erotic'.
At this transition point, our actions change from 'fun' to 'erotic' the moment I feel him moving inside of me as I stare straight up at the sun and the clouds without a worry or a care in the world and the experience we both feel becomes 'purely erotic' as we bring each other to orgasm in the middle of that hay field, as if we were making love within the privacy of my own bedroom.
