A man is waiting in the supermarket check-out queue with his young son when the lad notices the display of Durex Condoms.

“What are they for Dad?” Asks the lad.

His father considers the matter for a moment then decides that, at 8 years old, his son is old enough to be told and so explains exactly what condoms are used for.

The lad absorbs the information and a minute later says “But Dad; why are these in packets of 3?”

His father, quick-as-a-flash replies “Those are for College Students. One for Friday night, one for Saturday night and one for Sunday night”.

The lad accepts this then, after another minute asks “What about these in packets of 6 then Dad?”

His Dad responds “Well, those are for University Students. Two for Friday night, two for Saturday night and two for Sunday night”.

Again the lad accepts this; then, after another minute asks “What about these in packets of 12 Dad? Who are they for?”

“Ah well” says his father. “Those are for the Married Men. One for January, one for February……”