My brother would feed me that. No sugar though, just the mustard on bread. He was 7 years older than me, so he was a teenager then and knew nothing of feeding a little kid lolWay back in high school, I knew a guy who ate mustard sandwiches with sugar on top.....as in a slice of bread with mustard smeared on it and sugar sprinkled on top. Yes, you read that right.
Although, I probably shouldn't knock it.......b/c I never had the nerve to try it.
He also ate mashed potato sandwiches too