When Are Pajamas Not Pajamas?

Apparently when you call them a suit. Or maybe the question is when is a suit not a suit? When it's made of flannel and costs more than $100. I'm not sure what my position is on pajamas that look like a suit on a webcam. Part of me thinks why not just get dressed? Put on a shirt with a collar, and a cardigan and comb your hair.

An additional part of me thinks that if I wanted to sleep in my suit I could just go and get many martinis in the hotel bar and get to the same place. It doesn't sound as restful as making a conscious decision to slip into nice pjs and really rest.