well, you go on with nasty mayo then..lol
But you can't tell me if you put lettuce, tomato, onions, pickles, and mustard and mayo on a burger it doesn't alter the flavor. I mean, if you don't like ketchup, thats one thing. I usually only put ketchup on a burger and a hotdog. I don't typically use it on aything else like french fries, etc..