Dave: "That's so gay." It's not... correct or something. You know that commercial telling kids that saying, "that's so gay," is wrong.
Me: It is wrong.
Me: Because it's offensive.
Dave: To who? Gay people?
Me: Yes, as well as their friends, family, and so on.
Dave: Why? It means happy.
Me: Oh, is that how you use it or how your kids use it?
Dave: No, you're right. Are you offended by it?
Me: Yes, I'm offended every time you say that.
Editor's note: Dave used that phrase more than usual after this conversation and made a big show of apologizing either before or after using it.