Talk:Monster Girl Encyclopedia World Guide III: Sabbath Grimoire/@comment-46040649-20200924174620/@comment-10429980-20200930021154

To my knowledge it's never been said that the pokes that are intended to truly break the skin (vampire fangs) to feed or inject something physical (girtablilu venom) do not cause injury (heck, girtablilu stings explicitly do hurt a bit at first). Rather, the presumption is that the injury is very minor and the sheer vitality that flows into the man from the monster likely would heal him in short order.

To be clear, it's a different matter for mershark teeth or a cursed sword's blade, both of which explicitly do not actually break the skin.