Our Love Is Different

"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 The Casanova, or special Mind Control 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 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 The Hero is rarely ever allowed to be wrong. Of course, misunderstandings implying that The Casanova was really a Jerkass all along are still quite common in order for the couple to 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 refuses to listen to anyone about it because true love is the best thing ever. Changing status quo in this situation usually requires a Batman Gambit by a third party, a What an Idiot moment by the seducer, or a compeltely random coincidence exposing him for what he really is.

Use of this trope is necessary in most stories with a central focus on All Girls Want Bad Boys.

Examples:

 * Forever Amber 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 The Casanova. 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, willfully ignoring all evidence to the contrary.
 * It's this aspect of her character that ends the story when
 * One episode of 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 Clint Eastwood) 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.
 * This is what happens in the meta-narrative of Dragon Age if you get 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.
 * The whole point of Love in The Afternoon.
 * Arguably the point of The Twilight Saga. 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. Your Mileage May Vary on whether their relationship is an abusive one.