My 4 year old loves to get in the fridge and eat mayonnaise and butter with a spoon. He has done this since he was able to get into the fridge on his own (about 2 years). Usually, he will not eat anything unless it is smothered with either mayo or butter. I know this is not very healthy for older adults, but can this be bad for a child? I wouldn't say he is obese, but he is not necessarily skinny either.