A man sat at a local bar and said:

“This is a special day, l’m celebrating.”

“What a coincidence”, said the woman next to him, “I’m celebrating, too”, she said and clinked glasses with him.

“What are your celebrating?” the woman asked.

“I’m a chicken farmer, and for years all my hens were infertile,

but today they’re finally fertile.”

“What a coincidence”, the woman said, “For my husband and I have been trying to have a child.

Today, my gynaecologist told me l’m pregnant!  How did your chickens become fertile?”, she asked .

“I switched cocks”, he replied. “What a coincidence”, she said.