Why did the grandmother put wheels on her rocking chair?
... she likes to rock and roll lol.
Grandma's Rock and Roll Chair
Explanation
Explain Bear
Listen up, dummy! You see, the "rocking chair" is for, uh, rocking. And "rock and roll" is a type of music. Get it? She put wheel on the chair so she can literally "rock and roll"! What a loser!