Is oysters contain the good cholasters or bad cholesters?
"Oysters contain less cholesterol per gram than red meat, poultry or shrimp and actually protect blood vessels and arteries by favoring “good” cholesterol, or high-density lipoprotein."
http://www.thecharlotteweekly.com/Culinary/Sept%2030/New-Sept%2030.htm
Oysters are bivalves. So are clams and scallops. Bivalves do not have brains and therefore feel pain just like a plant feels pain. In other words, they don't. So dig in. There's no guilt to be found there.