This was a letter written to a friend. You can pretend like it was to you personally, if you like...
Cats are disgusting. You should never own a cat. I know you may think you’re missing out on something, but if you never trust anything I say, trust me when I say this, “You aren’t missing out on anything. I swear.”
Have you ever heard the phrase, "you look like something the cat drug in?" Exactly. Cats are nasty and drag nasty things around.
When you get older and you notice that a boy owns a cat and he doesn't live with his sister or mother, that should be seen as an immediate deal breaker and you should not date him. However, you can be friends with him and then your first act of friendship should be to tell him to get rid of the cat. Everyone wins.