There are a number of pictures of teenagers that have been in the gallery for years. (some of their jackets even say 'HS' on them). I never gave them much thought until recently. On one hand, they are biologically adults, but on the other, they are legally and socially still children (at least in industrialized nations). Granted, it's not always easy to tell if someone is high-school age or college age (I find this especially so with Japanese and Malaysian women, who tend to be short), but there are some which I think are pretty obviously in high school. Kinda a legally and ethically fuzzy area.