Me: Have you seen Dr. Horrible's Sing Along Blog? If not, you should watch it.
Friend: No. What is it?
Me: It's a project that Neil Patrick Harris and a few others did during the writer's strike. It's about 45 minutes long.
Friend: Okay, I will watch during lunch. However, [Boss] is coming back to town and I have to be on my best behavior at work now.
Me: Neil Patrick Harris plays a character named Dr. Horrible who is trying to gain acceptance into the Evil League of Evil, and he's in love with a girl, and it's a musical, and it's very bizarre, and hilarious.
Friend: It sounds lame, are you SURE its funny?
Friend: And are you SURE you aren't gay?
This would be the time when I would normally say "Yes, I'm sure I'm not gay. Bring your sister over and I'll prove it." Luckily, I caught myself and remembered that my friend's sister died a few years ago. That would've been as bad as the time I used a "your mom" joke on a friend whose parents died when he was young.