Spiritually speaking, what is wrong with male prostitution?

I can appreciate the objection that many have to the exploitation of women and children. Women are "wired" differently for and children aren't old enough or experienced enough. But, many guys wouldn't care at all about being ually used by either men or women and would love to get paid for it, too. And, many men and I'm sure some women would love the opportunity to have some recreational with no strings attached and just some money changing hands. So, uming they played safe with their customers (which would be good for business, as well as their health), what is morally wrong with male prostitution?