Vader had played so wonderfully into Palpatine's hands too - in ways he didn't even realize, still. The man was a master manipulator for certain.

Don't trust wealthy old men. A lesson he thought he knew.

"It's common enough. Food, incense, candles. Not everyone does it but many cultures do." Once Tech had the box, Vader just pushes himself forward, moving as he still has legs attached but only Force replacing them. "If they'll tell you a name or title to addresses term as it's best, and it's best to use your most polished manners until they say otherwise." Mostly lessons he'd learned in Sith tombs that.