[sprogs]

A man walked into a chemist and bought a pack of condoms. Paid for them and walked out laughing hysterically.
Naturally the chemist was a little alarmed, but thought "Oh well, it's his problem".
Two days later the same man called in again, asked for a pack of condoms, paid and left laughing hysterically.
The chemist was now intrigued and said to his assistant, "the next time that man comes in I want you to follow him and see were he goes".
Two days later, sure enough, pack of condoms and hysterical laughter.
"Off you go", said the chemist, "follow him!"
Two hours later the assistant returns looking a little sheepish.
"Well," said the chemist, "Where did he go?"
"Your house".