Jack is capable of dressing himself (mostly, so long as there aren't any buttons or whatever involved and if you are flexible about which shoe goes on which foot). It doesn't happen every day because it takes him so catlicking long to focus and get something done on his own that usually I just dress him. Cause, you know: I've got things to do.
But when he does dress himself, there is one element that is always present: Red pants.
Jack will emerge from his room wearing whichever shirt strikes his fancy - often something with a hood so he can be a Jedi, or maybe with his favorite character of the moment, but it is always joined by a pair of red sweatpants.
Yesterday, he dressed himself in an ivory sweatshirt with an orange and blue camping motif... and red sweatpants. It really didn't work together at all, but whatever; I let it go.
In the course of the day, his outfit got dirty, so I asked him to change. Sure enough he managed to find, buried in his drawer, another pair of red sweatpants. I didn't even know he had another pair.
Why red sweatpants? I have no idea. His favorite color is blue, and I don't think I've ever said or done anything to encourage this particular satorical choice.
But I'm not going to say anything. I like seeing what he comes up with on his own.