They can talk about it afterwards, like reasonable, presented dynamics. Maybe.

Marco lets his hands slip back onto Jean's hips, squeezing a little as Jean kisses his neck, making him exhale slowly. Then Jean bites, hard and sharp, and Marco's body jolts as he gives a low moan. He definitely enjoys a little bit of an ache with this, he's finding, and he pulls Jean's hips closer with a low whine.

Does Jean want him to return the favor? Because he's already leaning in to nose at his neck, placing a kiss over his scent glands but going lower.