Prostitution is sometimes called the "oldest profession" or "oldest occupation". A female prostitute is sometimes called a "hooker", "whore" or "ho". A male prostitute is sometimes called a "gigolo". They can both be called a "street walker", "sex worker" or "escort". Customers or clients are sometimes called "sugar mamas", "stellas" or "janes" if female. They are called "johns" if male.