Totally just my opinion from experience ( turned out to be a rant on my lunch time. haha )

Without knowing a lot about you. I'm going to guess, boredom. And as well as not having anything satisfy your chemical needs of "happiness". Most people have this issue and rely on certain things... chronic video game playing, drugs, sex, ect. It's easy just turn on, pop in, or fuck. It's not complicated and it's relatively easy. SEX is massive cocktail of chemical happiness. It surges like no other. (besides drugs, haha)

Hobbies or things you're passionate about has more depth, experience, and connection (runners high, boxers adrenaline rush, dancers rush, ect) You can share stories and connect on experience. It also has a very human component where you connect with another person.

For example, I like sport rock climbing. It has so many elements and depth to it. I meet other climbers who connect with me on my experiences as well.

You'll think a lot less about sex, if you have other things satisfying your chemical "happiness" needs. The alternative does as much as sex.

There's nothing wrong with having a massive sexual appetite. You're in perfect health. Mastering it and understanding it is something entirely up to you.

To be honest, if didn't work on mastering my sexuality and understanding it, If I had a choice to fuck 10 times a day 7 days a week, I would. It's just how I'm built, it's in my DNA.

However, it's an inefficient use of my time. It drains my energy, have large refractory periods that puts in in "down time", and a spikes my dopamine levels so high that I can't take in other forms of happiness.

I rather spend that on socially connecting with people, working on my passions, and experiencing the world.