I’ve never had a corndog. Or any variety of Hamburger Helper. I’m 47 and had my first (and last) sno-cone about 5 years ago. I’ve never had coffee, sushi, or lobster. I’ve probably had liver, but if so, I can’t remember it. It’s not “never”, but in the last 38 years I haven’t eaten an egg that wasn’t disguised in brownies or other baked goods. Boiled, fried, poached, scrambled or in a quiche - no way.
StG
Never had a Big Mac. Never will.
Raw oysters - nope. Fried, sure; steamed, sure. Raw - no way.
I’ve lived my whole life until last year in the Southern United States but I’ve never had chitterlings. (That’s “chitlins,” y’all). I have no plans to ever try them either.
And although I’ve lived in Budapest for almost a year now, I’ve not had the gulyás yet. (That’s “goulash,” y’all.) But it is not outside the realm of possibility, as are the above-mentioned items.
oh! oh! Twinkies! I knew there was something else. Never touched one. They look so gross, like sponges.
I really, really wish you all would stop mentioning Big Macs! Now I’m seriously CRAVING one! 
Add sushi to my list too. Don’t ever intend to try it either.
There’s a bunch of other stuff, but it’s not like typical food - it’s stuff like rutebegas and squash and stuff.