“What is this perfume, and how could it do this?” your girlfriend asks, looking at the bottle she’s still clutching.
“I bought it at this weird store downtown. I thought it was just normal perfume.”
“You bought something you weren’t sure about at some weird place and then just gave it to me to test?”
“No, it’s not like that, I just…” Words fail you.
She stands there for a moment, and then gets a smirk on her face. “Your turn,” she says, and before you can do anything she sprays some of the perfume on you.