One of the things I most enjoy about photography is its ability to capture those moments that are absolutely and unequivocally real. No fake smiles and skinny-arm poses; no huddling together waiting for a flash; no opportunity to look at a tiny screen and say "aw, that's cute." I get to use plastic and glass to share the genuine moments that people would love to forget, but can't deny that they happened.
That's it. The rest is up to the viewer to decide. That's where the "reality" of pictures like this gets interpreted, reinvented, and flat out fabricated to suit the viewer's own point of view. Time to make up your own story for why these two are passed out on the bench.
And before you go laughing at somebody else for how they look while snoozing, remember that you most likely resemble a slobbering infant yourself while you sleep. I certainly do and there's proof thanks to unnamed a**holes that commandeered my camera one night.