I wouldn't be super comfortable with a wound made by raw incredients, especially meat. I'd use some antiseptic before applying a band-aid.
@Lilliwyt Yeah. Perhaps they made a mistake and took responsibility the old-fashioned way? However, neither loved the other one, so they just stayed together for some time. But then, I suppose, they ran out of patience or maybe the old man already found Akane, whom he actually loved. Based on this, they most likely didn't spend their time arguing all the time like many "responsibility" couples of the old did.