all of above, plus its likely they are rich, and can. Moreso there is a reverse trend with rich and famous women too, preying on young men for their sexual partnering. This proves that MONEY CAN BUY ANYTHING including ANY kind of partner you want, you dont have to succumb to fate of who you meet, it just makes it a whole lot more easier. nt sure why but im sure psychologists might have some interesting 'newish' views upon this, hell, even sociologists (as they tend to explain the social trends in a little more general way, in which a lot of people often underestimate this as 'oh, everyone knows this'. This is not the case, it just looks deceptively simple, only because they used everyday language, (sometimes its definitely not so).
As for me, i guess they are just plain skin deep and probably very lonely, and yet the whole thing does a terrific job of covering up all that.