The friction catches Alfred off guard and he moans loudly right back - but then Herbert is pulling back, being...gentle. Respectful. It's...surprisingly sweet, given the circumstances, and he finds himself leaning his cheek into the cool hand.

"...I...I feel b-" He pauses, seeming to realize something, and with a moment of focus, FINALLY puts that second fang away, sighing with relief.

"I feel better...yes. Th-thank you. I think...I think your...blood...helped."

And if that didn't, he definitely feels warmer NOW for Other Reasons.