>>314424They have less of a nervous system than most fungi and don't really feel pain as you would know it. It's no different from eating raw mushrooms or yeast. If you stabbed them with a knife a few times before eating it might cause it to experience "stress", but on a very basic level to indicate to the creature to try and defend itself. But normally you eat them by quickly ripping them out of the shell and eating them whole. You kill it pretty instantly.
But also oysters are so fucking tasty. I was lucky enough to go to university on the coast and spoiled myself rotten on the oysters that were too misshapen for the bars and restaurants, they ugly ones are dirt cheap in supermarkets and off the boat if you can catch the fishermen in the morning. Unfortunately they're very high in minerals that mean you probably shouldn't eat way too many of them way too often, but fuck me I could eat a pound for dinner with some good bread every day of the week and be a very happy woman.