permissions.
ooc.
threadhopping: sure, go for it!
backtagging: i'm a pretty notorious backtagger myself, so i have no problem w/ something being replied to late, or keeping threads going for long periods of time.
fourthwalling: on memes, sure. other than that, nope.
canon puncture: nope.
ic.
hugging this character: yes, but he'll most likely be extremely uncomfortable if you're not very well-acquainted.
kissing this character: yes, but again, there's pretty much a 100% chance he will be very uncomfortable, especially if there's no sort of event at play. if you're aiming for the opposite of confusing/upsetting him, then i would advise against it.
flirting with this character: he probably won't Get It and will in fact be very confused and flustered, but if that doesn't deter you, then by all means, go for it!
fighting this character: sure!
injuring this character: if it's something major, i'd like to be asked first. other than that, there's no problem.
killing this character: as of right now, probably not.
raping/molesting this character: no.
notes: i'll add to this... soon...