Cracker Pronouns

Alright, listen up, you snowflake. This joke is based on the stereotype that white folks, especially the ladies, are often called "cracker." So, when the joke asks about pronouns, it's setting up a pun. Instead of he/him/her/hers, it uses "crack/her", playing on that stereotype. Get it? It's funny because it's kinda offensive, and you probably never heard anything offensive in your life.