I don't remember how we got on the subject of furries, but this is how it ended:
Me: People that wear fur suits for sexual gratification are called "furries". It's under the sexual fetishes section of the DSM IV.
Mom: Oh? You think I should read that section?
Me: Do you like bubblegum?
Mom: Yes I do!
Me: You won't after you read that section.
My mom had the good graces to not continue the conversation. She seems to know me and my methods...