Sorry, this survey begs of a write in and I'm voting for Bob Eubanks of the Newlywed Game (a Chuck Barris production btw). When host Bob Eubanks asked the wives where the most unusual place they’ve had the urge to have whoopee, one of the contestants said, in the “asshole”. Obviously, the answers he was looking for were locations and not body orifices.
Here's the clip:
Another example of Bob Eubanks goading on a contestant and having way too much fun: