Karkat can feel the press of John’s arousal against one of his arms. His fingers twitch and reach helplessly, but his limbs are pushed as far as they can go. John chuckles against his shoulder, aware of Karkat’s efforts, and noses against the troll’s ear, warm breaths ghosting against sensitive flesh. “You’re so, well, eager like this, Karkat!”

"At first you'd thought Terezi felt a little left out of this clusterfuck of a relationship, always watching you and Karkat at each others' throats and goading each other on, but you've come to realize that she doesn't mind being a little on the sidelines. Correction: she gets off on it."