They were all getting married and their mum was a bit worried about how their sex life would get started.
She made them promise to send a postcard with a few words on how marital sex felt, when they were on honeymoon.
The first one sent a card from Hawaii two days after the wedding.
It said nothing but "Nescafe".
Mum was puzzled at first, but then went to the kitchen and got out a jar of Nescafe.
It said "Good till the last drop". Mum blushed but was pleased for her daughter.
The second girl sent a card from Vermont a week after the wedding and the card read "Rothmans". Mum went stright to her cigarettes and on the pack it read "Extra long. King size". She again was embarrassed, but happy for her daughter.
The third girl left for her honeymoon in New Zealand.
Mum waited for a week, nothing. Another week, still nothing.
Then after a month a card arrived. Written in a shaky the words "Air New Zealand".
Mum looked through a magazine and saw the airlines advertisement which said
"Ten times a day, seven days a week, both ways".