The term sex industry refers to those commercial enterprises which employ sex workers. What they offer is called adult entertainment, as it comprises a number of forms of entertainment not considered suitable for children.

Categories of sex industry:

• Cybersex
• Striptease
• Live sex show: a performance on stage where the performers carry out sexual activities.
• Peep show
• Pornography
• Prostitution
• Erotic massage
• Sex shop
• Telephone sex

A sex theatre may feature striptease, live sex shows and/or pornographic movies.