These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Horror: One can only hope the children of the paternity show guests never see the episode(s) featuring their parents, especially in the case of promiscuous mothers.
Especially because the show is such a Long Runner—fifteen years as of 2013—that in theory, a child who has been brought on to have her paternity disproven could end up birthing her own child with disputed parentage.
"And the lie detector test determined THAT'S A LIE/you were telling THE TRUTH!" (Never "...determined you were telling A LIE" or "...determined THAT'S THE TRUTH", which would make it less predictable.)
Maury is also the source of "CHICKEN TETRAZINNI!", a favorite clip on The Soup and the winner of the show's best moment of the year.
Made substantially worse if the man decides to leave the woman if the child isn't his, as this will usually get the man booed off the stage.
For some reason, any case involving the paternity of a child if the man being tested is deceased, because it never seems to turn out that he was the child's father. Tragic for the mother, the child, and the living family of the deceased to the point of frustration. Best to try to turn off your emotions when an episode features a segment like that.
Viewer Gender Confusion: The point of "Man or Woman?" episodes — 10-15 people come onstage as women, while the audience tries to guess if they are really female or male.
It's quite easy when you've seen several shows before and realize the patterns. Most of the ones that look the most like women (usually, also with large breasts) and are dressed in the most revealing outfits are actually men, and the ones who move and behave awkwardly, are purposely done up to look like transvestites, and are often bodybuilders, are actually the women. With these facts, you will be right in your guesses most of the time.
The Woobie: Whenever a man breaks down in tears when he finds out he isn't the biological father of his beloved child.
Why Would Anyone Take Him Back? The times where the same couple come back time after time, and each time leave the show having ended it because s/he cheats, lies, or whatever.
This could especially apply to the Abusive Men episodes, particularly when there are children involved.