The stark difference, would be how John reveled in his ability for unhindered destruction of people and things. There wasn't a world where John would feel he would live up to the standards that Kitty deserved, but he also thought he was destined for evil anyway.
Which also was the furthest thing from John's mind. Right in front of him, and especially against him was Kitty. The way her mouth pressed to his, and the way she tasted. The feel of her tongue- and that moan.
John unraveled quickly.
His dark animalistic desire pushed forward as one of his hands snaked down to her thigh and pulled up on is so he could snake closer to her body. Pressing firmly against her and pinning her against that wall of the hall, John groaned against her lips. Eager to meet her tongue with his, John's own body naturally pressed firmly as his hips moved very intently.
Then with a gasp almost, his mouth left hers and moved to the crook of her neck where it met her jawline. A growl as his lips danced and his teeth grazed over her flesh until he found her earlobe. A soft nip and a raspy moan into her ear as his hips pressed against her again very pointedly. A lone tone in his voice. "I could take you right here." John heavy with suggestion, because hallway be damned.