An elderly gentleman shuffles into a drug store and asks for some 
Viagra. That's not a problem says the pharmacist, "how many do you 
want? Just a few, maybe four, says the pensioner, "but could you 
cut them into four pieces?"

That won't do much good replies the pharmacist. The customer looks 
at the man and sighs "I'm 83 years old - I'm not interested in sex 
anymore" he says "I just want to stick it out far enough  so I 
don't piss on my shoes"