If he wanted, he could find someone willing, but he felt bad about doing it for some reason. Like he was letting his brother down somehow.

He got to his feet and walked over to where Sam was laying and sat down on the edge of the bed. Reached a hand over to rest on his brother's shoulder a minute and then leaned down to press his lips to Sam's neck. His fangs ran out and he pierced the skin as gently as he could, then drank slowly from the wound. Breathed a sigh of relief and comfort as he leaned into Sam's warmth.