Chalice had gotten sick so Bendy's blood donar had to get swapped. Since the asylum couldn't risk the demon that was made entirely out of blood getting sick. And for some reason the head doctors though it was a good idea to make Cuphead the blood donar. So now Cuphead was dealing with Bendy biting and sucking on his arm. Leaving dark red bite marks in their wake. However Cuphead was more focused on the terrifying sensation he felt looking at Bendy. But even with his fear, he couldn't help but feel bad for the demon. Always needing to so dependant on blood. No matter the blood type.