Pajamas are super cool when you're a kid. You could get a onesie with built-in feet, ninja outfits, or a screen printed tuxedo top and bottom. I was thinking about how lame adult pajamas are, and then I realized that I can still get all those things, I just don't sleep in them anymore. In fact, I could go buy a ninja outfit tomorrow and wear it around town if I want. When you're a kid, you assume that you'll walk around in ninja outfits and tuxedos all the time as an adult, but then you grow up and find that there are drawbacks to wearing a karate outfit to work.