It is the really, really stupid pleasure of listening sad songs like the "The Promise" by Michael Nyman or "La valse d'Amélie" in piano version.
Friend 1: Hey Martin! stop listening those sad songs... Are you feeling depress?
Friend 2: No man... I just like the sadness
Friend 1: Oh, I see, it's like a sadgasm... right?
Friend 2: Yeah
Friend 1: Okey... just don't kill your self
Friend 2: Don't worry man
Friend 1: (Shit!, I start feeling depressed)