I can't seem to pin what is doing damage back to me or my teammate but if he attacks he is fine. If i attack, my Lute has "sets masocist" and "gives whiplash" and I take damage back.

Later in combat, I'll buff myself with every skill i think is good, use Rhyme, then give that to my ally and he'll start hurting himself. I don't know what skill it is but every time i give him a certain skill he does damage to himself per hit. Is that the intended effect of the Masocist ability? or is it a bug? I'd just like to know for future reference.