That's not true at all, I had multitude of friends that had 5-10+ sexual partners at age of 20, I also had friends with 3 sexual partners at age ~25-28. Number of sexual partners correlate with attractiveness and promiscuousness more than age.
How is that creepy? Or maybe in which part of the world is it creepy? in your cultural circle? Because in EU where I live nothing about it is creepy.
How is creepy to have own preference? I can't have it? It's not like I'm judging someone by their race that they can't change, I'm judging them by their own actions. They choose to behave in certain way, and it's ok, it's their choice to do what they want, but don't tell me I'm creepy because I have my own preferences, I can choose freely too.