I am incapable of irony, because irony takes some imagination, and promptness, at least in face to face conversation. I may understand other people's irony if it is not directed at me, in which case I feel bloodily wound. Sarcasm takes more aggressiveness, I lack it, and as of sarcasm being directed at me see above, but the wounds are annihilating. There may be also some sort of well meaning irony, but it must be interpreted as well meaning and I don't have that capacity.