I am working on a computer with two monitors.
Dad: Wow! Look at the girl with her two screens. Her friends would be jealous.
Nathan: There'll be three monitors soon.
Dad: When you give her two screens, she will be bipolar. If you give her three, she'll be schizophrenic.
Dad: Don't you get it? Two is bi, so bipolar, and then--
Me: But schizophrenic has nothing to do with three!
Dad: It's more than two, so it's like wooo... (makes wavy motions around his face)
Dad: Never mind. I guess you two don't get pharmaceutical jokes.