Grilled cheese using mayo instead of butter to cover the bread

Instead of butter use mayo to cover the bread. I just discovered this after reading about in online last night at work. I went crazy this morning I had to try it. made grilled ham cheese with eggs onions and banana peppers. Our son and his friend ate two but their both twelve and have hollow legs. to me mayo covers and spreads easily over bread and seems to toast better. I'm happy about this discovery thought I'd share.