Where a person's virginity or absence thereof can be confirmed by some sort of sign or symbol immediately visible on them (that is to say, definitely not requiring a gynecological examination [[note]]In real life, it may be difficult to determine if someone has previously had sexual intercourse even with a gynecological examination -- see [[http://en.wikipedia.org/wiki/Virginity_test here]][[/note]]). This can work through magic, AppliedPhlebotinum, or simply social convention.

Compare DidYouJustHaveSex, NerdsAreVirgins (nerdiness as a Virginity Flag), SexDressed, VirginityMakesYouStupid, VirginPower, VirginVision (the unjustified form of this). Sometimes, this can be faked with a ConsummationCounterfeit, as when the {{MacGuffin}} is a bloodstain on the sheets.
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!!Examples:

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[[folder:Anime and Manga]]
* Everyone in the world of ''{{Loveless}}'' has kitty ears and a tail that fall off when they lose their virginity. This connection is conveyed through social cues within the story, and exactly what point defines 'the outer border of virginity' is never really defined. For all the sexually charged atmosphere, the lead is a twelve-year-old boy. A grown woman with ears is teased about still having hers, and having already ''lost'' their ears is a sign of some enemy characters' pitiful depravity, but the wider social implications, for example in high school or religious orders, aren't explored.
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[[folder:Film]]
* [[http://www.youtube.com/watch?v=P0Z_OWPe6fU The song]] in ''PodPeople'' has an audio technician wearing a shirt that reads "I'm a Virgin".
** Parodied in the [[http://www.youtube.com/watch?v=7_zrBgzuNjs MST3K bit]] from the same episode, where TV's Frank wears a similar shirt.
* In ''Film/{{Teeth}}'', Dawn wears handmade t-shirt proclaiming abstinence and a purity ring.
* In ''Film/The40YearOldVirgin'', this is first subverted and then played straight. At first, nobody realizes that the main character is a virgin, despite overt cluelessness about sex to the tune of thinking that breasts felt like "bags of sand". On the other hand, the daughter of his primary love interest can tell he's a virgin, somehow having gained the ability to spot anyone's virginity flag simply by virtue of spending her high school days with sexed-up teenage boys.
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[[folder:Literature]]
* In the SF shared world of Medea, the resident alien females ''lose a pair of legs'' after having sex.
* In MadeleineLEngle's ''ManyWaters'', only "innocents" can ride unicorns. (Otherwise, they disappear.)
* In ''Literature/NineteenEightyFour'', a scarlet sash is the emblem of the Junior Anti-Sex League, which advocates celibacy.
** [[spoiler: Invoked by TheProtagonist who wears it has slept with plenty of men, and simply wears it to ''act'' like the good patriotic Party member]]
* In MercedesLackey's ''TalesOfTheFiveHundredKingdoms'', unicorns act as living 'virgin detectors.' Beautiful, beautiful, brainless virgin detectors... This can cause some [[HilarityEnsues issues]] when one does not want their virginity (or gender for that matter) known.
* In ''Literature/TheBible'', after Amnon rapes her, Tamar tears her garment that was reserved for the king's virgin daughters. Her full brother Absolom immediately realizes what happened when he sees her.
* The thranx of the HumanxCommonwealth look a lot like giant praying mantids. Unlike [[DeathBySex praying mantids]], male thranx only lose their vestigial wings the first time they have sex.
* ''Literature/SongAtDawn'' It is customary for a bride to wear her hair up after consumating her marriage (i.e. lossing her virginity.) [[spoiler: Estela doesn't do it after her marriage because John isn't interested in doing it with her. Instead, she does it after a traumatic experience with a stable hand that she doesn't want to admit to herself was a mistake.]]
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[[folder: Live Action TV]]
* In the fourth series of ''Series/{{Misfits}}'', there's a minor character who has the power to make the number of sexual partners a person has had appear on that person's forehead. How the power defines sex for this purpose is not specified. Judging from the effect on characters with known sexual histories, receiving oral sex apparently doesn't count.

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[[folder:Fan Fic]]

* [[http://www.fanfiction.net/s/8869552/1/Snowmaiden This]] fan fic implies that everyone in Middle Earth has a VirginityFlag, but only elves can see it. (Overlaps with ''VirginVision'', but the elf claims it is a visible sign in the eyes)
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[[folder:Music Video]]
* [[http://www.albinoblacksheep.com/flash/bunny The fan-made video]] for {{Music/TISM}}’s “Everyone Else Has Had More Sex Than Me” with everyone’s number of either sexual partners or number of sexual escapades written on their shirts. And yep, there’s [[NobodyLovestheBassist one poor fellow]] with a “0” on there. And one with “[[NoodleIncident 3.5]]”.
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[[folder:Newspaper Comics]]
* The creator of ComicStrip/{{Dilbert}} can’t exactly announce when the titular character has sex thanks to newspaper censors, but he [[WordOfGod explained to curious fans]] that he’d show it in-universe by [[GettingCrapPastTheRadar drawing Dilbert's tie uncharacteristically limp]].
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[[folder:Theatre]]
* In ''MeAndMyDick'', the virginal Sally's Miss Cooter wears a flower prominently.
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[[folder:Webcomics]]
* [[http://www.pbfcomics.com/227/ The strip called "Preserves"]] of ''PerryBibleFellowship''.
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