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.
Crowning Moment of Heartwarming: Any episode that features an adult trying to find their birth mother/father when the mother/father in question actually is their parent, and when the parent actually does want to be the person's mother/father.
Darkness-Induced Audience Apathy: In most cases, as amusing as it may be for the studio and TV audiences, the adults involved in DNA tests are genuinely unlikable people who you don't want to envision with any type of responsibility with a child.
There was one case where a mom came on to prove that her deceased son was not the father of another woman's child. However, she did it in a way that would have gotten her booed if she was the second person introduced, but she was the first. Then, the mother of the infant comes out and gets violently booed. When it was revealed the deceased son was not the father, she poured on the verbal abuse so much, it came dangerously close to a Face Heel Double Turn. Maury himself looked increasingly uncomfortable as the bickering went on.
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.
Unfortunate Implications: It's very rare for a father to be present on the out-of-control teen girl episodes. This gives a very negative view of single parents note Then again, considering the type of show it is.... Granted, it's possible only one parent was able to attend, but it'd be hard to say that for every guest.
The "Man or Woman?" episodes in the Viewer Gender Confusion example might have some of this.
One episode dealt with tomboyish girls who dressed as boys; everyone acted like their behavior was inherently wrong and that they should start dressing in more feminine clothing. The fact that these girls weren't hurting anyone and liked dressing the way they did apparently has no relevance.
Anything but monogamous heterosexuality in general is horribly misunderstood at best and looked down upon at worst.
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, in an effort to hit viewers with a Shocking Swerve. 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.
For some, the children of the guests. Most of the guests are not people you want to imagine raising children.
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.