I have in the past used precisely the latter to describe myself to others. Last Saturday I was at a student party: I spent the late afternoon and early evening chatting with both friends and new acquaintances pretty much non-stop, drank up to the point where my behaviour became just a bit more impulsive than usual, danced into the wee hours of the morning and exchanged some crude sexual rites with a stranger.

I unquestionably had fun. It will also take me at least a couple of weeks before I can talk to more than one people at a time without feeling exhausted. Until then, my free time will be spent with a pair of headphones, my reading queue, a 4X videogame, and no human interaction closer than Skype.