Guys like Tiger woods would do it... just for fun... they pay the girl for leaving rather than for the sex...

Some guys even if they are single they prefer paid sex although they have girls falling over them... just for the fact there is no "relationship" he is free to date or mate with any or many other prostitutes... he dont have to buy gifts, he dont have to remember "dates", call her up to check how she is doing, make small talk...

Then these paid girls who know what they are doing, and what to do and not just lying on their back... as if doing a favor for going to bed with a guy.