This.
Like its so hard for a good looking, muscular 21 year old kid to get laid in todays uber-connected world. Back in the day we managed to hook up and we didn't have the internet with hundreds of chicks at our fingertips. ..don't see what's so hard to believe at all
Flinstones looks to be a good looking guy and hes muscular. At 21, girls love this shit (obviously most women do), and they dont look beyond this. So, its definitely plausible that he gets good looking women.
The problem is that as he gets older, women are going to want more than a muscular body. But I guess as long as he is having fun now, kudos to him.