Not me but a guy I knew used to have peanut butter and mayonnaise sandwiches. I tried a bite and it honestly wasn't as bad as I thought it would be. Not the kind of thing I'd make for myself though.
From the comments this seems not so odd... But my go to is two pieces of white bread with cheese and mustard microwaves. I call it a mustard sandwich and my mother hates me for it...
And in the name of science I tried mustard on watermelon recently, and I was positively surprised. It has to be some really strong and course mustard, none of that Dijon slop.
Haha same. Marmite is one of my hated foods. Not too keen on Bovril either, they both seem the same to me. I think it might be the smell and look of the stuff that puts me off.