Maybe 2/3 of the people in my age group have. But I think some of them really like the party lifestyle/promiscuity or just enjoy being single.

I mean, I expect my social life to kinda die in 5 years. I hang out every week with my friends and married ones show no interest in joining us. Eventually, the vast majority of us will get married...

So what happens? Does the group just get much smaller but the partying continue?