Sometimes I wear pants with a zipper, sometimes I wear button fly...so as you can see it's all very complicated stuff and you have no reason not to take me as seriously as I take myself.
He is simply entertaining an audience for a little while until it is once again TIME TO PARTY PARTY, WE ALL WILL PARTY HARD. i don't think he's pretentious, people ask what's going on in his head and he usually tells them. That's his schtick.
"PARTY PARTY PARTY PARTY HARD. And indeed, it is the nature of existence, of my existence, to party hard. SO WE MUST PARTY PARTY PARTY.."