He spends a minute just thrusting his fingers in cruel imitation, watching the spit trail down Eren's front and start to stain the collar of his shirt. Eren presses down a little against his foot and he ignores it for now. He finally pulls his fingers out of Eren's mouth, taking a moment to cup Eren's jaw to look at him again. Then he smacks the side of his face - not as hard as he could, but hard enough to rattle.

"Arms up," he tells Eren, voice firm. He waits out any sluggishness or resistance until he does so, and then reaches down, tugging off Eren's shirt with one hand. With the other, he grabs hold of one of Eren's hands, threading their fingers together and holding it up.

It'd be romantic, if not for the fact the boot's still pressing against him. Jean works open his pants with the other hand, slick with Eren's spit, pulling his cock out with a sigh. He's only half hard, stroking himself once, but he knows how to change that. He taps Eren's forehead with two wet fingers until he tilts his head back.

"Mouth open. Watch your teeth," he warns, as he takes his cock in hand and presses it to Eren's lips.