A pun is a kind of humor that depends on similarities in sound or meaning between tow words.

Someone says one word but means another.

Example:

A woman saw a bear a week before her baby was born. Frightened, she asked the doctor:

-"Will seeing that bear affect my baby?"

After the baby was born, the doctor said:

-"Yes, your baby has two bare feet."

Now, can you say a PUN?