A man sat at a local bar and said:

“This is a special day, I’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 I’m pregnant!

How did your chickens become fertile?”, she asked.

“I switched cocks”, he replied.

“What a coincidence”, she said.