Being hungry for sex is as natural as being hungry for food, as is being hungry for movement, sunshine and fresh air in nature. And all have been around since at least the beginning of life on Earth. It’s only the mind that makes a big deal out of any of them.
“Human” is just a term for an educated animal with the capacity to self-reflect. Connect in with your hind brain and how it relates to your spine and your primal urges.