Dean had lied to Sam about nearly everything when it came to Amara. The lie about not knowing what being near Amara felt like was just one more to add to the list.
Dean knew damn well what it felt like.
Being around the Darkness felt exactly like holding the First Blade had.
Both felt like they were the most natural thing in the world. Both had a thrill to them that he couldn't bring himself to contemplate giving up.
Both were the kind of fuck-you-up addiction that he'd never had a prayer of shaking.
Dean thought that maybe that feeling went both ways, that that was the only reason Dean Amara hadn't killed him yet.
Yeah, being in Amara's presence was just like giving into the Mark had been.
Dean hadn't really lied after all, then. It wasn't love, or desire.
It was inevitability.