We don't know what he was doing there, so let's speculate.
He's naked, so there's a good chance of sex happening. Maybe his lover's partner came home early? That's be awkward. Maybe he's a teenager and his partner's parents came home? SUPER AWKWARD.
Whatever was going on, he figured he was better off shivering (at least) five stories up than dealing with the situation inside. And I assume based on the poster's Facebook that this happened in Paris. The high the day it went on FB was 60. Brrrr...
What I Do, Job-wise: So. Much. Other than playing on-air every day (and on DO YOU HATE IT? Sunday nights), you might get an e-mail response from me if you write in asking to know the name of a song or whether we're looking for interns. I'm all over the place, like a ninja, but less stealthy.