Yes ... you read it correctly in the title. Christian Grey is Dexter Morgan.
Now, obviously they're not exactly the same. But there are enough similarities to make an eerie comparison.
For those who don't know: Christian Grey is the super-hot billionaire in E.L. James' wildly popular novel series Fifty Shades of Grey and corresponding motion picture franchise. He lures Anastasia Steele into his red room of pain in order to convince her to be his latest submissive. The backstory is that Christian Grey is supposed to be a grown-up Edward Cullen in fan fiction inspired by Stephenie Meyer's Twilight series.
Dexter Morgan is the serial killer in the Showtime series Dexter, who only kills bad people. Dexter, which ran for eight seasons, is based on the Dexter book series, by Jeff Lindsay.
These are both wildly simplistic descriptions of these characters and their corresponding stories.
But, getting back to my point, these two characters have some pretty significant similarities.
Dexter Morgan's mother was brutally murdered when Dexter was very young, and also in the same room. The detectives found him near his mother's dead body and one of the policemen adopted him.
This is the biggest thing connecting them, because these are the moments that influence their characters.
For Dexter, this experience of witnessing his mother's murder influenced his psyche and tendencies toward murder. His father, the man who adopted him, even gave Dexter a "code" so he wouldn't get out of control.
For Christian, the traumatic experience of his mother committing suicide manifested in violence as a growing boy. At 15 years old, he took a job landscaping for a family friend, the woman who initially seduced him and introduced him to the world of BDSM.
These vices--dominance and murder--are also, in many ways, elements of the subconscious. They're instinctual and animalistic. And they're in direct opposition to these characters' intellects, which drives their public images.
Before these women, the men were psychopaths. Dexter openly admits to this, and there's a scene at the beginning of Fifty Shades of Grey that suggests Christian might understand this about himself as well. Ana, interviewing Christian in place of her roommate, Kate, asks about Christian's philanthropy. Christian response with something along the lines of "it's good business," and notes that most people say he doesn't have much of a heart because they know him.
But Rita, and her children, place others (outside of his immediate family) under Dexter's care. He not only grows to love Rita, but he loves her family as well. Similarly with Ana, Christian allows himself to feel emotions for her that he had not previously let himself feel for other women. She is more than just a submissive--she is his partner.
In both of these characters, the vice serves as a way to exert control over their circumstances, to cope with not being able to control what happened to their mothers all those years ago. Despite loving adoptive families, both still hold deep pain that can only begin to heal once they confront it alongside the hope of a future. In both cases, the future involves a potential family. At the very least, a spouse.