|Sean the Mechanic|
He was a love interest of Debra Morgan, and Dexter Morgan and Rita Bennett had a double date with them. Rita noted that Debra and Sean were very affectionate with each other, in contrast to her relationship with Dexter. When Rita mentioned to Dexter how Debra and Sean couldn't keep their hands off each other, Dexter made a weak attempt to act more caring.
Sean later turned out to be married and Debra dumped him.
"I can kill a man, dismember his body, and be home in time for Letterman. But knowing what to say when my girlfriend is feeling insecure… I’m totally lost." ~Dexter