wow...I think I may be your hubby. I don't mind oysters and I don't like roller coasters...lol
My advice if you're going to eat the oyster is make sure you DO NOT ATTEMPT TO CHEW IT! Sometimes their is a bit of a sandy feeling and it can get a bit icky if you think about it too much. Cocktail sauce is always a bonus as well. Being drunk is another added bonus when attempting to eat something like this for the 1st time...lol (like when I tried Rocky Mountain Oysters for the 1st time...If you don't know what they are, well, they aren't oysters...lol..I suggest googling to clarify..lol)
As far as the coasters...I really don't enjoy them, and even if triple dog dared I would probably ride, but would not have a good time. On a trip to disney a few years ago, I told hubby "I want to ride space mountain". I think it was more of a 'I've been to disney countless times and that's about the only thing I've never ridden" (is ridden a word? lol) Needless to say, I rode it and didn't care for it; but I'm not sorry I sucked it up and went. I have no problems with the 'virtual' rides, as I know I'm in a seat and it's a psychological 'I can't get hurt" thing.
For the record, hubby will ride every coaster in every park and loves them. I use that time to go FastPass tickets to other rides that I know he would enjoy but I won't, so maybe that can be the middle ground? You ride the scary rides, and he fast passes them for you so he doesn't have a lot of down/alone time having to wait.