->''Only you, only you can,''
->''you are unique''
->''at last. Alas''
->''it is a boring song''
->''but it works every time''
-->--Siren Song by Margaret Atwood

A person is dealing with someone who they know has uncanny powers of charm. These can be normal features of TheCasanova, or special MindControl abilities. So, knowing this, a person will be on their guard, right?

Well, not exactly. Because while this guy might be a selfish manipulator of women ''most of the time'', when it's with me, he's different. He's sweet and kind and caring, and everything that other people say about him is because [[YoureJustJealous they're just jealous]] and don't really know him.

Cynical sounding write-up aside, when this trope happens to the protagonist in a story, they'll almost always be right, simply out of the genre convention that TheHero is rarely ever allowed to be wrong. Of course, misunderstandings implying that TheCasanova was really a JerkAss [[JerkWithAHeartOfJerk all along]] are still quite common in order for the couple to [[EarnYourHappyEnding earn their happy ending]].

This trope can also be played from a completely tragic angle, where it's obvious to everyone that one half of this "relationship" is being played like a fiddle, but she [[SelectiveObliviousness refuses]] to listen to anyone about it because true love is the best thing ever. Changing status quo in this situation usually requires a BatmanGambit by a third party, a WhatAnIdiot moment by the seducer, or a completely random coincidence exposing him for what he really is. (Alternately, it can played as tragic for the seducer: the former Casanova really has changed their ways, but [[CryingWolf no one believes them]] and no one finds out - at least, not until after it's too late...)

Use of this trope is necessary in most stories with a central focus on AllGirlsWantBadBoys.
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!'''Examples:'''
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[[folder:Film]]
* The whole point of ''{{Love in the Afternoon}}''.
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[[folder:Literature]]
* ''Literature/ForeverAmber'' takes an odd view of this trope. When Amber first meets Bruce Carlton at sixteen years of age, she's convinced that they're true lovers even after he leaves, and this continues when they reunite some years later. The thing is, Amber ''knows'' he's TheCasanova. When her stepdaughter becomes infatuated with him, Amber is cruel and blunt in explaining about how Carlton only cares about her to the extent it gets him laid. And yet never at any point does Amber consider that her infatuation with him is any different, [[SelectiveObliviousness willfully ignoring]] all evidence to the contrary.
** It's this aspect of her character that ends the story when [[spoiler:two nobles at the English Court who are [[EnemyMine normally enemies]] decide that Amber's highly fickle political whims make her too dangerous to keep around. They forge a note from Carlton saying he loves her and wants her to follow him back to America- and poof! Problem solved!]]
* Arguably the point of ''TheTwilightSaga''. Bella falls in love with Edward, even though he (and her friends) keep reminding her just how dangerous he is. It is even mentioned that the reason Edward is so charming and gorgeous is to lure his prey, since he is a vampire.
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[[folder:Live Action TV]]
* One episode of ''Series/{{Maverick}}'' has this happen to the daughter of an old family friend of Bret's. Notable in that it's unclear whether the old man's daughter is being manipulated until halfway through, when the man (played by Creator/ClintEastwood) visits his other girlfriend and they discuss how his plans to seduce the old man's daughter and gain access to the ranch are going. Also notable in that the plot isn't resolved by Maverick seducing the daughter, like you'd expect. [[spoiler:He actually tricks Creator/ClintEastwood into thinking Maverick's a high-grade gunslinger who could conceivably beat him in a duel, exposing him as a coward when he flees town.]]
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[[folder:Theatre]]
* ''Theatre/ThrillMe'' has this trope, down to Nathan actually saying the line, "I thought we had something different!" Richard attempts to pretend that this is only due to Nathan's SelectiveObliviousness, but there are a few moments of AwLookTheyReallyDoLoveEachOther that prove that's not ''entirely'' true. [[MasochismTango Not that it's the best relationship regardless.]]
[[/folder]]

[[folder:Video Games]]
* This is what happens in the meta-narrative of ''VideoGame/DragonAgeOrigins'' if you get [[AnythingThatMoves Zevran]] to love you. In this case the "love is different" spiel is played off as genuine, as Zevran admits he isn't even sure what true love is.
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