Teacher: "What is an OS? And give me an example."

Student: "An OS is a word which can be used instead of saying 'Oh Yes'. For example, do you like ice cream? You can reply, ‘Oh, yes' or 'OS.'

Teacher: "You may sit down now."

What was the dog doing on the turnpike?

About seven miles an hour.

If more than one mouse is mice...

Does that mean more than one spouse is spice?

Woman: "Do you have a greeting card which reads 'You are my first and last love'?"

Store keeper: "Yes ma'am, we do."

Woman: "Perfect! Give me 10 such cards!"