www (dot) playbo....er, not that one.
This is the subpage I was looking at:
Social Support and Dopamine Receptors (significant to everything we do on this site) | Reuniting
It talks about how popular people have more dopamine receptors (chicken or egg?), which makes sad, sober, sense to me.
In case anyone is sensitive, I'm warning for erotic art and photos of animals doing it.