The salty licorice thread that popped up here yesterday got me to thinking about things that start out tasting strange or downright unpleasant and develop into a rarified addiction. Retsina comes to mind. Also Liederkrantz cheese and oil-cured olives. Chartreuse and bitter lemon. Sardines with raw garlic. What is your favorite deadly little snack that elicits shudders of revulsion from the non-partakers?