Castiel, of course, is just exceptionally poor at knowing when something is a joke or not, so he only squints, tilts his head a little to the side. "I'm not certain most my celestial brothers would approve, so not really, no." This is a party and it isn't wise to bring up inter species relationships, so he backs off a little. A lot, actually. This has gone back to awkward and he isn't certain how to fix it. "Do you -- I -- could make you a new drink?"