A person who works in this field is called a prostitute and is a type of sex worker. It is sometimes referred to euphemistically as 'the world's oldest profession' in the English-speaking world. Prostitution is sometimes described as sexual services, commercial sex or, colloquially, hooking. The requirement of physical contact also creates the risk of transferring diseases. sexual intercourse, non-penetrative sex, oral sex, etc.) with the customer.
The definition of “sexual activity” varies, and is often defined as an activity requiring physical contact (e.g. Prostitution is the business or practice of engaging in sexual activity in exchange for payment.