SSSSStammer

A middle aged woman goes into a shop where they sell all manner of sex oriented objects. Behind the counter is a pimply young lad, the lady goes up to the counter and asks, "ddddo yayayayou ssssell vvvvvv vvvvvv vvvvvibrators"?
"Why, yes". replied the young fellow, impressed the old girl even knew what one was, but with a stammer like that, mybe she had troubles attracting the attentions of a man.
"Wwwwwwwell, ddddo yyyyyou hhhave one aaaaaa aaaaaa aaabout this big"?
Again the the young shop assistant answered in the affirmative.

"Wwwwwwell hhhhhow the fffffffffff ffffffffffff hell do yyyyyou turn it off"?