On May 7, 1964, my friend P. knocked on my door to introduce me to his girlfriend M and her friend R. I invited them in and he immediately stretched out on my bed, grabbed my 75 c "Playboy Calendar" and proceeded to ogle one playmate after another.
At that time, such calendars were not available in South Africa, and mine had arrived there together with my luggage aboard the mining and exploration vessel "Rockeater" on her maiden voyage from Long Beach, CA to Capetown, S.A.

His girlfriend was sitting on the bed next to him and looked a bit embarrassed, while R. - who was supposedly destined to be my date - was standing as far away from me as possible.
I told P. that in Holland we had a proverb :
I explained that here he was looking at a dozen mere photographs while the real thing, his girlfriend, was sitting right next to him. Perhaps he would like to swap, his girlfriend for my calendar?
"O.K.," he said, "But you'd have to ask her first!"
I looked at her and asked: "How about it?" and she did not hesitate a moment to say: "O.K."
And that's how I got my mate M. for the next 40 years.