FOURTHWALL you will confuse him to the point that it loses all fun
OFFENSIVE SUBJECTS: n/a
HUGGING will probably accept it
KISSING see above
FLIRTING he has no game
INJURING okay with minor stuff
TELEPATHY go for it. expect loud noises.
WARNINGS he's (willingly) subjected himself to heavy scarification and will talk about that pretty casually if it comes up. same with the idea of sacrificing oneself for battle.