Three brothers ages 92, 94, and 96 live in a house together.
One night the 96-year-old fills up the bath, puts his foot in, and pauses. He yells down the stairs, “Was I getting in or out of the bath?”
The 94-year-old yells back, “I don’t know, I’ll come up and see.” He starts up the stairs and pauses, then he yells, “Was I going up the stairs or coming down?”
The 92-year-old is sitting at the kitchen table having coffee listening to his brothers. He shakes his head and says, “I sure hope I never get that forgetful.” He knocks on wood for good luck.
He then yells, “I’ll come up and help both of you as soon as I see who’s at the door.”
Explanation: The humor builds as each older brother experiences forgetfulness, with the youngest appearing sharp until the punchline reveals he’s just as absent-minded, mistaking his own knock on wood for someone at the door. The irony and escalating confusion make the joke particularly funny.