We must remember this came from a young woman's scrapbook, so odds are good that at least one of this guys is a beau or a brother. The older guy on the left has an A on his sweater. The high school starts with an A, but then again so do to of the local colleges. And he looks the sophisticated sort.
The guy on the right is a bit younger, but they both seem to have comfortable airs about their personality. That's not the sort of assumption you can make from one photograph, but I'm staring at several.
As for being out and sitting on a rock ... well, it all depends on the rock when it comes to comfort.