Suzie - here's the set up...I think.
2 men (lets call them "A" & "B"), 2 women (we'll call them "Y" & "Z") are sent off on a "group date" of sorts...some type of activity like dining or whatever...then, they switch the pairings at one point.
After that, they introduce "the Fifth Wheel" ("X", who could be a man or woman) where conflict (and much wanted "tv drama") may occur.
You see, A may be digging Y alot but Y REALLY likes B. Meanwhile, B, who doesn't care for Y totally digs Z....
But then, X comes in and screws things up for A because X is waaaay hotter than Y, A thinks. And poor little Y...because B also thinks X is hot.
I haven't seen much of the show but from what I've seen, thats what I've gathered.
It's a dating game with multiple cases of "clusterfucks".
Oh, yeah...at the end, A & B vote for which one out of X, Y or Z they liked to be with but THEN X Y or Z has to pick the same person as well to "win"...
Sometimes everyone goes home a loser.
And if everyone geos home a "winner" there is still that Fifth Wheel, left hangin' out to dry.
If my little explanation doesn't help then...
go <a href=http://www.5thwheeltv.com/getting_any.html>here</a> and check out the Episode Summaries...you'll see what I was trying to get at.