Old man and viagra

An old man goes into a chemist to buy some Viagra.

"Can I have 6 tablets, cut in quarters please?"

"I can cut them for you" said the chemist "but a quarter tablet will not give you a full erection."

"I am 96" said the old man . "I don't want an erection.

Spoiler:

I just want it sticking out far enough so I don't pee on my slippers."