Wellllll as long as it's gentle touching, I suppose, otherwise he might be risking a Bunny-kick to the face. KIDDING KIDDING

Cabal would certainly be curious about blood magic! It's very different from the type of necromancy that Johannes practices, which is treated more as a science than a form of magic. It's really the ingredients in his serums (heartstring of a virgin, pituitary glands, that sort of thing) that make them have magical effects, haha xD