Hardly Thinking On His Feet?

An elderly gentleman goes into a pharmacy to buy some Viagra. 'Can I
have 6 tablets, cut in quarters?' he asks.

'I can cut them for you' said the pharmacist, 'but a quarter tablet
will not give you a full erection.'

'I am 96' said the old man. 'I don't want an erection. I just want it
sticking out far enough so I don't piss on my slippers.'