Old woman and vibrators
 

An old woman goes in to a sex shop, shaking.
"Sir," she says in a shaky voice, "do you sell vibrators?"
"Yes, ma'am."
"And are they this big around and this long?" she asks in a shaky voice.
"Yes, ma'am."
"And they're $22.95?" she asks in a shaky voice.
"Yes, ma'am."
"How do you turn them off?"