A hustler is an escort boy. Hustlers sell their bodies for money like prostitutes.
what's different between a hustler and a casual prostitute is that a hustler is from a higher rank, he's a kind of "luxury-prostitute". he's independant most of the time, and don't have to share his "wages" with a pimp.
Sometimes he could work in a very renowned escort service.
he barly walks the streets, and he often has the possibility of choosing his customers for he's pretty rich since he asks for high fee. it can be 600 dollars and can reach 2000 dollars in average but for the "best" they can earn 7000 dollars for only one sex-night with only one single customer.
Hustlers take great care of their body. (do sports, eat well). Most of hustlers are passive, but some are versatile.
hustlers are very common in japan, where homosexuality is deeply rooted in mindset. but because of western culture homosexuality is being more and more a hidden social stigma.
in japan male prostitutes are called "host" (pronounce "hosto" in japanese.)
(sorry for my spelling)
This hot twink you can see over there is a hustler. he offers his services only for men.
Besides, I don't think you could afford him.