Headcanons wahooo
Teasing ; I'm a little silly so... I feel like boothill would be the type of person to like. Kiss and make out with his lover passionately but pull back as soon as things escalate. He wants to put them on edge and make them want more.
Being gentle ; Boothill would probaby be a gentle lover when it comes to things like cuddling and comforting. He'll hold them closer and kiss their forehead, gently brushing their hair out of the way and pepper their face in gentle kisses to help them feel better. Despite being aggressive most of the time, his cyborg heart still feels sympathy and he also tends to be protective of his lover, quickly resorting to violence without hesitation if someone upsets/hurts them.