ok new headcanon aquired: i don't think being healed by angel grace is in any way pleasurable actually. I think it is only pleasurable to Dean. And only when it's Cas who is healing him. And it's because grace is the angel essence in the purest form. The warmth and safety Dean feels every time Cas heals him? That's because Cas loves him. Every time Cas infuses Dean with his grace, Cas' love flows thru Dean's veins. Literally.
you simply haven't witnessed sublime tv until you've seen a nun (five feet tall) (in her 70s) pin a demon's hand to the floor with a knife, pull on rubber gloves, interrogate (torture) him with a bucket of (common, innocuous) cleaning products, and cut a holy relic (a saint's thighbone) (surprisingly shiny) out of his stomach with scissors.
Tell me about the woman in the passenger seat of that car. She's afraid she's gonna die. As long as the car is moving, she's safe. But she needs a plan for when it stops. A way to fight back.