Bob calls over to his neighbour: “Hey Larry, going away on holiday again this summer?”
“Yes, I hope to”, said Larry, “but I need a different suggestion.”
“Go ahead ask me”, says Bob.
“You know last year you suggested Hawaii, and when I returned my wife was pregnant”, Larry says.
Bob replies, “Yes, but …”, and Larry cuts him short.
“And the year before you suggested Bermuda, and when I returned my wife was pregnant”, Larry continues.
“Yes, but..”, and again Larry cuts Bob off.
“And the year before that, when I went to Bali, I returned and my wife was pregnant.”
“Well”, says Larry, “could you suggest something cheaper this year so that I can bring her with me?”