Being married to James Marsden is the number one cause of infidelity in movies. In fact, cheating on the blandly handsome actor appears to be right up there with accepting a $1 million bribe from Robert Redford on the spectrum of adultery we'll let female characters get away with. All this despite the fact that he is usually objectively superior to the other guy in all of the categories that women usually find worth marrying and not cheating on. For instance ...

5 The X-Men Series

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James Marsden Is Married To: Jean Grey, played by a delightful Famke Janssen.

Why She Married Him: He's dashingly handsome, a strong field general in a time of war and a good husband. Also, he saves her life.

How She Repays Him: Kisses Wolverine, who repeatedly calls James Marsden "a dick," returns from the grave to kill James Marsden and make out with Wolverine again.

What He Did Wrong: Bad hair? It steadily improves over the course of the three films, but still ...