Why is sex so important to men?

I had a man tell me that although he may like a woman a lot and sees himself settling down in the future- he just can’t see himself committing right now because he loves sex too much. He’s not in a place mentally where he is ready to settle down with only one person. He even shared that in the past, he wouldn’t give his real name to women because he knew he just wanted sex and nothing else.
Now I’m fascinated by this…. Meaning, why are men like this? To be so obsessed with pleasure that you would jeopardize not committing to one person and having a family. I know men and women think differently but why would a man choose a minute of pleasure with a random person rather than a lifetime of love with one person. Is sex with one person that bad to men?
Why is sex so important to men?
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