Let me lighten the heavy load you're carrying around.
No matter what country you are born & raised in, a child's parents & extended family participate in the indoctrination process that instills the values, expectations & rules that will be required to exist & prosper in society. This usually includes an introduction to the family's belief system, people to admire, people to fear & hate and so on and so on.
I was taught that LUST was bad and LOVE was good, as if one was opposite the other. I have come to the conclusion that LUST and LOVE are not even related to each other. One is an emotional response and the other is a bodily function that we are pre-programmed to experience as a means to the continuation of the species. We sometimes fall in love with someone we have sex with, but we most certainly do NOT have sex with everyone we truly love.
All male mammals have much the same "Wiring By Mother Nature" instincts. There are three distinct parts to a male mammals sex life: 1) The Hunt for a Potential Recipient, 2) The Chase & Staging after Capitulation, followed quickly by 3) The Planting of the Seed. Think about First Time Sex with an individual as compared to Sex in a Marriage. The comparison can best be summed up with the phrase 'You can't Rape the Willing." There is no Hunt, no Chase, no Capitulation. Our indoctrination most certainly did not include the factoid that a Man's biggest thrill wasn't the moaning & the groaning if it didn't include the Hunt and Chase portion. Who knew?
An education system that hides certain important facts about Human Sexuality is ultimately responsible for sending vulnerable teen age boys and girls out into the world with false expectations and ill prepared for the events that may lead to infidelity and far too many single parent households. Boys are often told that marriage means never having to go on the hunt for sex partners and for the inexperienced, that shady promise turns hollow when the sexual boredom becomes apparent.
You may not be comfortable lumping the sex act with coughing, sneezing, pooping, peeing, eating & sleeping. Just think how different 'wedlock' would be for both participants if sexual fidelity didn't enter into the vows spoken during the wedding ceremony.