Playing With: Affair Hair

Basic Trope: A woman finds a piece of hair on her husband's clothing, pillow, etc. that is obviously not her own (e.g. longer or shorter, different color, different texture, etc.) that indicates her husband is (or at least may be) cheating.
  • Straight: Alice is doing laundry, and finds a long, blonde hair on Bob's jacket. This indicates to her that Bob is cheating on her; where else could that hair have come from?
  • Exaggerated:
    • Alice finds not only the hair, but some lipstick and a whiff of perfume, neither of which is her colour/fragrance. Later that day, she finds a used condom in the trash, when she and Bob haven't had sex in months (or don't use condoms).
    • Alice finds a lot of hair on Bob's jacket. Turns out Bob has a Cat Girl (who is shedding) for a mistress.
    • Alice finds a wig.
    • Alice finds the other woman draped over Bob's shoulders.
  • Downplayed: Alice finds a hair on Bob's jacket that's a slightly different shade than hers, but could have come from him, maybe. She needs more evidence.
  • Justified: Alice needs evidence before she goes off accusing her husband of cheating on her, and an obviously foreign hair strand can be a good indicator.
  • Inverted: Alice finds all sorts of signs that Bob is cheating (not the least of which is a strand of blonde hair, see "Exaggerated 1"), but still believes Bob is faithful to her.
  • Gender-Inverted: Bob finds a blond hair on Alice's jacket.
  • Subverted: The hair (found on the sofa) belongs to their neighbor, Claire, who sat on the sofa during the Super Bowl party last night.
  • Double Subverted: It turns out that (after a few too many beers), Bob and Claire did it on the sofa when Alice was out of the room.
  • Parodied:
  • Zig Zagged: Alice finds a long, blonde hair, and accuses Bob of cheating... But Bob isn't cheating at all, and proves it. Alice apologizes... But it turns out she knew exactly who the hair belonged to the whole time, as she's the one who's been cheating, and just accused Bob so he wouldn't suspect that Alice was sleeping with another woman.
  • Averted:
    • Alice doesn't find any evidence (real or just perceived) of Bob's infidelity (whether or not Bob actually is being faithful or is just good at getting rid of/hiding evidence is another matter entirely).
    • Bob isn't cheating at all.
  • Enforced: The hair serves as a Chekhov's Gun, or at least a MacGuffin, in a Chick Flick.
  • Lampshaded: "This isn't my hair!"
  • Invoked:
    • Alice suspects Bob of cheating, so she carefully searches Bob's possessions for evidence.
    • Claire leaves hair on Bob's coat to break up Alice and Bob.
  • Exploited: Alice doesn't mind Bob's infidelity, but Bob has a reputation at stake. She decides that it's the perfect opportunity for some Blackmail.
  • Defied:
    • Bob *is* cheating, but carefully destroys or gets rid of any evidence; he uses a lint roller to remove any foreign hairs from his clothes, he lets his mistress dispose of the condoms they used (or simply doesn't use them), covers up his mistress' perfume with copious amounts of his own cologne, uses one of those detergent markers to get rid of lipstick stains (or does his own laundry), deletes his emails and text messages, and acts super sweet to Alice so she won't suspect anything.
    • "There's a thousand possible places this hair on Bob's jacket could have come from; assuming it means he's cheating on me would be insane."
  • Discussed: "Bob! Whose hair is this on your jacket?" "This isn't a chick flick, Alice. Do you know how many people I bump into on the subway every day?"
  • Conversed: "Oh look, she found a hair. I haven't seen this a million times before."
  • Implied: Charlie and Deborah are discussing why Alice and Bob seem to be drifting apart lately. Deborah notes that Bob's jacket was kind of dirty yesterday.
  • Deconstructed:
  • Reconstructed: Alice and Bob eventually get their lives back in order, and mature as people. They may even manage to save their marriage, and become a stronger couple.
  • Played For Laughs:
  • Played For Drama: When Alice confronts Bob with the hair (or other evidence), Bob admits to cheating. They either decide to end the marriage, or attempt to salvage it (but whether they do or not, their relationship will never be the same). Possibly Alice goes on a Roaring Rampage of Revenge, but not against Bob (bonus points if it was a case of Mistaken for Cheating).

This isn't my hair!