The tag "my-18" refers to a specific category of adult content that typically features individuals who are 18 years old or younger. This is often used to denote age-play themes, where older individuals may engage in pretend role-plays with younger partners or characters, which can include various power dynamic and authority themes. It's essential to note that this tag should not be confused with actual underage participants, as it only represents a fantasy scenario and should not involve real minors.