Metaphorically speaking, as I was explaining to my wife last night:
Sometimes when you're sick you just need some Vick's vapo-rub to feel better. Other times, you need to vomit. Perhaps you need to vomit a lot. Sometimes your only source of survival is shrimp and shrimp makes you vomit, so you eat shrimp to live and then you vomit a lot. Over and over and over again. You're not trying to be difficult. You just have to vomit.