I once watched a Spongebob porn-thing. A man had a Spongebob costume on. It was basically a large cardboard box painted to look like the lovable sponge character and had a hole cut out for the actor's face, which was painted yellow. It also might've had a hole for the cock, I can't remember.
About 2 minutes in, a woman who just barely resembled Sandy came over and gave Spongebob a BJ. The odd thing was, the make up people (assuming this porn hired people to do the make up) didn't bother painting his genitals. In fact, nothing below the belt was painted, except for the exposed portion of his legs (the calf area).
I stopped watching at that point.
Probably the best porno I've ever seen.