A mother had three daughters and, as circumstances would have it, they were all due to get married within the same month. Being the worrying mum that she was, she was concerned about how their sex lives would start and so made them all promise to send a postcard from their honeymoons with a few words on how marital sex felt. Her eldest daughter sent a card from Hawaii two days after her wedding. The card simply said "Nescafe".

The mum was confused at first but then went to the kitchen and got out a jar of the aforementioned coffee. It read "Good 'til the last drop!". The mum was a little embarrassed but was none the less pleased for her daughter. A week later her second daughter sent her postcard from a private mountain cabin, and the card read "Benson & Hedges." Catching onto her daughters' subtlety, the mum raced for a packed of the ciggies and read "Extra long. King size".

Again the mother blushed but was pleased for her daughter. Time passed by and the mum worried after not hearing anything from her youngest daughter.

Then, a month later, she received the important card. It read in shaky handwriting "British Airways". This was the most enigmatic card yet and the mum had trouble finding an appropriate ad. It said "Three times a day, seven days a week, both ways." The mum fainted!