Most people can probably agree sex is pretty great—at least, until something gross and unexpected happens and totally kills the mood. If you look back, you can probably think of at least a few scenarios where something disgusting happened in bed—something that, if you weren't pants-less, would have you running for the door at lightning speed. For your entertainment, and maybe to make you feel better about your own most recent icky encounter, here are the grossest things that have happened to guys during sex. Prepare yourself—they're pretty cringeworthy. I softened real fast. I almost gagged.