My wife and I sleep na-ked. One morning, I woke up to find brown streaks all over my legs, arms, and a big spot on my stomach.
I asked my wife, “What happened?” and saw that her back and arms were covered too.
It turns out she had been eating chocolate chips in bed, forgot about them, and the bag spilled and melted between us while we slept.
We laughed it off, but it was definitely a surprising thing to wake up to.