Why do girls in their 20's believe anything an older guy will tell her?

First of all I am a 23 year old male and girls my age seem to believe anything a guy in his 30's and up tell her. He is obviously a scumbag and he will feed her these bull crap lines and she goes with it. What makes a bald, out of shape, working in a restaurant as a waiter or bartender, always drinking at the pool, who is 30 years old so appealing? I take care of myself by eating healthy and working out( by the way I am not looking for a girlfriend). I may not be the smoothest talker, but I still have a fun time no matter what. About a week or two ago, my friend was approached by a couple who she has known for a month asked her if she wanted to have a threesome. She told them no, yet she wants to go get drunk with them. The couple are still trying really hard to get her to have a threesome with her. I mean what gives?