The question was about why Sam is not affected by holy water even though he has demon blood in him (x).
Via Codependent brothers
I really hope for season 10 they don’t just skim over the Demon!Dean deal. I hope it last more than just half the season and goes throughout all of season 10. If that means that we don’t have as many MOTW episodes then that’s a sacrifice I’m willing to take. Demon!Dean is far more important/interesting right now.
The time is now, on an evening very much like the one we have
Metatron: Because he is in love
Metatron: …With humanity