TragicWhiteKnight: I've got to stick up for the old Pajama Game. There's no better apparel to wear allowing you to lounge around your room goofing off instead of going to bed, making it quick and simple receive visitors (or wander into other people's rooms for late night chit-chats).
And, more importantly, PJs help keep my mind off sex; I normally start off all dressed up in bed, but then cast off my clothes as I get hornier and hornier - PJs act as a nice sexual straightjacket to stop me spending the night humping my duvet, pillow, mattress...(thank goodness I don't take a teddy to bed).
In short, it's not bananas to wear pajamas. And that's the way it is.