Plot: Early thirty-something dentist Dr. Charlie Logan has never experienced true love, despite having had a number of girlfriends over the years. After an announcement by one of his ex-girlfriends as such at her wedding, Charlie gets a reputation as being a good luck charm. Every woman he has slept with has met and married her dream man immediately following. He is encouraged to exploit this reputation by his long time best friend, Dr. Stu Klaminsky, a sex obsessed, sex starved schlub who became a plastic surgeon just so that he could masturbate over the sight of women's breasts. Charlie doesn't want to be solely a stepping stone for women, which is how they end up treating him once he gains this reputation as a lucky charm, but rather one's true love. He believes the woman of his dreams is accident-prone Cam Wexler, who works as the penguin caretaker at the aquarium. Cam initially doesn't want to date Charlie because of his reputation as a one-night stand type of guy. Charlie in turn doesn't want to sleep with Cam as he is certain she will find her true love after they do. Cam's true love seems destined to be penguin expert Howard Blaine. To get to true happiness, Charlie feels he needs to speak to Anisha Carpenter, who he feels is the cause of his current problems. Anisha ends up helping him in a way he doesn't expect.
Alternative Plot: Cursed since childhood, dentist Charlie Kagan (Dane Cook) cannot find the right woman. Even worse, he learns that each of his ex-girlfriends finds true love with the man she meets after her relationship with him ends. Hearing of Charlie's reputation as a good-luck charm, women from all over line up for a quick tryst. But when Charlie meets the woman (Jessica Alba) of his dreams, he must find a way to break the curse or risk losing her to the next man she meets.
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