Warning: The following gallery contains images and descriptions of an adult nature. What follows is also extremely unsexy. Click ahead at your own risk.
Nothing's worse than finally hooking up with that hot guy from high school only to discover that he's now a minivan-driving dad with old sandwiches and Cheerios all over the back seat. Being a homewrecker is always a sticky wicket, but in this case it's just plain sticky.
Want more? Check out more stomach-turning sex scenes here, here, here and here. Plus: Pick the most unsexy TV characters!