: In a sexual context, a "top" is the partner who takes the active or penetrative role.

: All performers must be 18 or older. Reputable sites follow strict 2257 record-keeping regulations (in the US) to verify the age of all participants.

The phrase "shemale top year 18" often appears in searches related to adult entertainment, specifically focusing on trans women (often referred to by the adult industry term "shemale") who take a dominant or "top" role in sexual encounters, and who are 18 years of age or older. Understanding the Terminology