[thomastjeffery]

"teen" is a ubiquitous porn category that, in practice, describes a body type, not age; similar to how "babe" almost never means "infant".

I would be more surprised to get SFW results from that prompt, considering the result would be based on more heavily regulated (less common) photographs of minors.

[mrguyorama]

No, teen in porn absolutely means 18 and 19, or at least "I'm '18-19' and definitely not a 26 year old"

[thomastjeffery]

Pick ten random 26 year old porn actors. I bet you their most recent scene was categorized as either "MILF" or "teen".