Michel Dorais describes four types of working patterns that male prostitutes usually fall into in his book, Rent Boys: the World of Male Sex Trade Workers. Those working in prostitution, especially street prostitutes, sometimes refer to the act of prostitution as turning tricks. Male clients, especially those who pick up prostitutes on the street or in bars, are sometimes called johns or tricks. A more dated term for a man who dressed similarly to female sex workers and tried to pass as a woman is known as a fairy. A man who does not regard himself as gay or bisexual, but who has sex with male clients for money, is sometimes called gay-for-pay, or trade. Thus one may be referred to as a male escort, gigolo (implying female customers), rent boy, hustler (more common for those soliciting in public places), model, or masseur. Where prostitution is illegal or taboo, it is common for male prostitutes to use euphemisms which present their business as providing companionship, nude modeling or dancing, body massage, or some other acceptable fee-for-service arrangement. Some terms vary by clientele or method of business. The terms used for male prostitutes generally differ from those used for females.