Earwax

I was making out and fooling around with a girl the other night. She was quite enthusiastic about sucking on my fingers when given the opportunity.

Then, all in one panicked moment, I realized that I had just finished scratching the inside of my ear, she was swooping in for another round of mock-fellatio, and my finger was almost definitely going to taste like earwax.

My lightning reflexes kicked in, and I quickly kissed her on the mouth to spare both of us from that unpleasantness.

...

Later, I tasted my own finger.

I was right to panic.