While staying with the grandparents...
3-year old runs up stairs yelling, "I'm gonna need a book Mom!" (I am sure you can crack that code as to what's about to happen in there.)
10 minutes later, child appears on stairs. Naked and reading. The book is big enough to cover his unmentionables. He descends down the stairs, completely engrossed in the book, walks into the playroom, and sits back down into his previous reading chair that he had left a few minutes before. As if nothing had changed.
No awareness that his pants and underwear are still upstairs.
That's our boy.