Thor was, of course, quite right to be wary of ulterior motives. Even if Tony only had the vaguest idea of a deeper agenda, even if his only conscious reasons for coming here had been to get a little sunshine and to bulk up his liquor collection - he was a creature of the Capitol, through and through. It was the only world he'd ever known, the only air he'd ever breathed. Pretense and dissimulation and embellishment were the languages he spoke, even when he intended to be forthright. Their values were absolutely his values. The selfishness and foot-thick shell of distance he'd always put between himself and anything or anyone else whatsoever were just ... a part of the national costume.
So if he didn't come off as trustworthy, or genuine - it was because he never really had been. Those had never been ideals to aspire to.
Of course, it didn't mean that he was never genuine; when Thor pulled out that new bottle, Tony clapped his hands together and rubbed them with an anticipation that was, yes, a little theatrical, but which he actually felt. "All right! There we go. That was easy." He reached out for it at once - not to take it, but to turn it in place on the table, just examining it. "I promise not to drain the market. I just like having a little variety at home. I never did settle on - you know, a default drink. I'm bad at favorites." The agony of choice was no doubt a common conundrum in the Capitol, and in many areas it paralyzed him as it would have anyone - but when to came to food and drink, it was just a liberating wonderland. If the populace at large had been asked what his sin of choice was, he supposed they'd have gone for lust, or maybe avarice, or, if they knew him best through the work he put into Peacekeeper's hands, maybe wrath. But it was gluttony all over - no question about it.
Or maybe sloth. Like he'd said - he was bad at favorites.
"How far is he from here?" He glanced up at Thor, meeting that smile with his own. "The guy who makes it. I wouldn't want to dip into your personal stores. Not when I have such a sweet ride at my disposal." He only had so much time left before someone came and took him back again. Maybe going trekking off to some poor innocent farmer's base of operations wasn't the kindest thing to do, but opportunities weren't to be wasted.