Alien crewmate: why are you crying? Did something happen?
Human crewmate: I'm fine I'm just cutting onions.
Alien crewmate: is this one of your human idioms?
Human crewmate: there ARE idioms about cutting onions, but no, this vegetable I'm cutting is called an onion and it's full of chemicals that make our eyes water and our nose run.
Alien crewmate: are they not poisonous? Why would you eat something that gives such a strong reaction? Your eyes are leaking excessively.
Human crewmate: listen, onions are the best vegetable, okay? Some people can't eat them raw but they're fucking delicious cooked. They make literally any dish better. You just have to get through the pain of cutting them first.
Alien crewmate, muttering to themself: and here we have further evidence that deathworlds drive their sentient inhabitants insane