Camels are built for difficult weather. They’re able to go on long treks through the worst conditions, go without water for a week or more and eschew food for several months.

As you might be able to tell from the last part of that sentence, food is something that’s very appreciated by camels, especially given how rarely they need to eat it. This person took advantage of that idea to give a camel a lemon — and, as you’d expect, he hated the shit out of it.