"Exactly! And that's why I'm a doctor." An obvious joke. Garrot can deeply appreciate that Luka's on the same wavelength as him, though. It's not as common as he'd like! "So I can give everyone medicine and be respected for it. Otherwise I'm just a drug dealer." And then he stifles a laugh for a moment before it just bursts out, because Garrot thinks his jokes are hilarious!

Even though they're terrible.