All "teens" have to be 21. Otherwise the sites run into all sorts of charges, you know what they are called, "c----d p----------y." Some can be 18, 19, or 20. However the age of majority is 21 in almost all states. The producers would never get a girl signed at an age less than 21, as she can fully void the contract, and these producers and distributors would face all sorts of "Traci Lords" type of infractions.