Two young brothers are sitting in the living room, watching TV with their parents. The mother looks over at the father with a wink and a nod toward upstairs. The father gets the message, and they both get up and head towards the stairs.
The mother turns back to the two boys and says, "we‚re going upstairs for a little while. You two stay here and watch TV, okay?"
The two boys nod in agreement, and the parents take off upstairs.
The eldest of the two boys is old enough to know what's going on, so he gets up and tiptoes upstairs. At the top of the stairs, he peeks into his mom and dad's bedroom and just shakes his head. Back downstairs, he says to his little brother, "Be real quiet, and follow me." Together, they tiptoe up the stairs.
Halfway up, the older brother turns to his brother and whispers, "Now I want you to keep in mind, this is the same woman who used to get mad at us for sucking our thumbs."