I seem to recall a link that was posted to this forum around 3-4 years ago. It was a promo for a US reality TV show and in the clip, the challenge each couple is set is to pie each other and then make out (I believe they showed three different sets of couples in the promo) and then there's a short interview clip after each one. If I recall correctly, the show consisted of couples in a relationship but that particular challenge intentionally teamed them up with someone else (cue predictable cutaways of jealous partners).
The only other details I remember was that it took place in a kitchen set and the thread linked to the page on the TV show's website, meaning that it won't be in the YouTube video archive. I searched for various things but couldn't seem to find it.
Sorry, the only one I can think of is from "The Amazing Race" (was that the title?).
But it was couples (not necessarily romantic couples, though most were), but they stayed together. One season they had to pie (or cake) each other several times during one episode, before they went on with the race.
I'd be interested in finding out which one you are referring to, myself!
Oh THAT show. It's not a true "reality show." It's a competition to see who can land a role on the now defunct As The World Turns soap opera. I'm sure CBS would blow a gasket and a half if this showed up on youtube.
The coverage would have been much better if CBS went with a simple pie crust/pudding/cool whip pie. The only thing worse than the coverage is the acting.