[Not good reading, but good for a group]

An older lady gets undressed and starts to get into the bathtub. She
gets about halfway into the tub and thinks, Was I getting into the
tub or getting out? She calls out, Bernice! Was I getting
into the bathtub or getting out?

Bernice says, Well I dont know. Ill have to come up and look.
Bernice starts walking up the stairs to the bathroom, gets halfway
up and thinks to herself, Was I going up the stairs or down? She
calls out Sally! Was I going up or down the stairs?

Sally, down in the living room calls back, How should I know? and
thinks to herself, Im glad Im not losing my mind like the other people
in this house.

So Sally starts…

Do you remember the punchline to this joke?