Title: Not the Blood
Pairing: Sam/Dean
Rating: NC-17
Word Count: 4000
Warnings: PWP with knifeplay, bloodplay, biting, and rough sex with a slight D/s-ish tint. General spoilers for Sam's storyline in S4.
Summary: Sam has a Pavlovian response, and Dean surprisingly doesn't freak out too much. See the warnings above.
(
'Seriously? That turned you on? Blood?' )