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"Dombrowski?" Cas reads as he looks up from his new FBI badge confused.
"Yes! You nerdy little badass. It's perfect!"
"Dean, I don't understand what is perfect about it."
"Because...reasons." Dean huffs.
"And those reasons are...? Castiel interrogates raising his brow.
Dean goes weak at the knees admitting, "Your sexy dom brow."
"My what?" Castiel squints while giving a slight head tilt but not the full on adorable angel head tilt that he usually does.
"Dom brow Cas. You have the sexiest dom brow when you have your smity face on. It's the perfect last name for you." Castiel looks skeptical while Dean continues on.
"No I refuse to accept any objections! When we get married I will be Mr. Dombrowski because I am taking your name as that is THE BEST last name ever!" Dean takes a breath from getting himself riled up.
Castiel's still confused and questions, "You don't want to keep the name of your parents?"
Dean rolled his eyes, "Why? Because they were such great parents? Screw them! I want to share a name that reminds me of somebody who's actually had my back all these years! Sammy can keep Winchester! I am going to be Mr. Dombrowski's husband!"
Sam clears this throat, "Actually Dean, I'm going to be taking Eileen's last name."
"What?! Nobody's going to be Winchester?!" Dean blurts out.
Castiel speaks up, "I'll take Winchester..."
"Shut it Dombrowski!! We're keeping your new name!" Dean interjects.
Castiel waves his hands up defeated and exasperatedly muttered..."why did I have to fall for an idiot?"
Dean smirks, "I like to think it was my perky nipples."