A young lad and his Grandpa were out walking when the lad bent down and picked something up. He showed it to his Grandpa who was surprised to see a Viagra in the boys hand. Oh it's nothing lad but let me have it and I will give you a pound for it tomorrow. The lad gave it to his Grandpa and thought nothing more of it.
The following day the old man gave the boy five pounds, "but Grandpa you said you would give me a pound" That's right son he said, the other four are from your Grandma.