Men's pants can be a lot more loose around the waist and we typically have no butt to hold things up.

You have probably noticed but never appreciated that men don't usually have big hips to keep our pants up (or more specifically our waists and hips tend to be very close to the same size). Some men do, but even well fitting pants slide down on me without a belt. My wife is always amazed when we take our measurements and the hip to waist ratio is so wildly different. She's like "I knew women's hips were bigger but Jesus Christ".

Not just men, I’m a woman and I wear a belt regularly. It keeps my pants from drooping because I’m thin with wide hips.

3 years ago I didn't wear any Then I did for work for like a week

I where one every single day now, it makes me feel Soo well in my clothes

That is the style at this time.