Okay, so, I'd like to clear up that they are NOT IN DANGER and they DO NOT CURRENTLY HARM THEMSELVES.
They simply brought it up to me, and I decided I needed another opinion.
Now, that being said, they said they have the urge to cut themselves. The assured me that they are in no way depressed (and knowing them for as long as I have, I know they aren't lying), though they do often feel bored (they are very intelligent), and that they simply like the way it looks on the skin.
They told me they liked the sight of blood, and they thought it was beautiful, though they made it very clear they wouldn't want to ingest any. (Apparently they didn't want to be linked to some people that like to taste it?) They do, though, bite their lip until it bleeds a lot, and then eat really salty food after so it stings.
They said they'd like to cut themselves so there was blood, but not deep enough so there would be any damage, and that they'd "obviously make sure the it was in a sterile way and ****".
They just seem to get pleasure out of pain, and they like blood.
Is this normal? Well, rather, is it so abnormal that it's wrong? (Because obviously that isn't normal.)
Please keep in mind they are not in danger, they have told me before they feel like cutting themselves for fun, but say they'd never do it because of the problems it would cause, and they hold that argument.
(And I know they're keeping their word because we went in their hot tub the other day with our bathing suits and there wasn't a scratch on them.)