Sex and the century
"Did God send you, too?" asked the child."Yes, dear," came the reply.
"What about Grandma and Grandpa?" "He sent them also," the mother said.
"Did he send their parents, too?" "Yes, dear, He did," said the mother patiently.
"So you're telling me that there has been no sex in this family for 100 years? No wonder everyone's so bloody grumpy."