Why can't orphans go outside?
Because their parents can't watch them!
Why can't orphans go outside?
Because their parents can't watch them!
Listen up, buttercup. You see, orphans don't have parents, right? So, the joke is that they can't go outside 'cause they got no parents to keep an eye on 'em! The joke plays on the word watch, as in supervising somebody or looking at something.