Placebo Group Surprise

I told my wife, “I’ve got good news and bad news.
The good news is, I was in a medical study for erectile dysfunction pills. They didn’t have enough women, so they made us make out with men. I wasn’t happy about it, but hey, I had my pills—I was rock hard, and we had amazing sex that night.”

She said, “Okay… so what’s the bad news?”
I said, “I was in the placebo group.”