This porn video tag refers to a specific type of content involving a young male participant who is engaged in homosexual acts or situations. The term "young" suggests that the individual involved is likely to be a teenager or younger, and "gay boy" further emphasizes his sexual orientation. The word "gay" itself indicates that the content features same-sex relationships between males, as opposed to other possible orientations such as bisexual or pansexual. This tag is used by adult viewers who are interested in this specific category of pornographic material featuring young gay boys.