While living in Germany I ran into an Army wife that made mashed potatoes with mayonnaise in them to make them creamier. Sounds gross, but is actually pretty good. She confided in me that her husband was horrified at the thought of eating potatoes that way and so she has snuck the offending ingredient into the recipe ever since. I thought that was good advise, and started quietly putting mayo into our potatoes. This has worked really well for us, since the boys can't eat any form of dairy, and we only ever have vanilla flavored soy milk in the house, I use the GF/CF mayo as a milk substitute. Sgt. G caught me the last time.
Sgt. G: Oh my God. What are you doing?
Me: um....cooking? you should go back into the living room now.
Sgt. G: you can't be putting that into the potatoes, it's disgusting!!
Me: would it make you feel better if I told you have eaten these potatoes several times already and you never noticed before?
Sgt. G: (fingers in his ears) LaLaLaLaLa!!
Me: oh yeah? I learned this from a wife in Germany, we moved back stateside 5 YEARS ago.
Sgt. G: you have seriously put that into my potatoes before.
Me: (looking slightly guilty) Not EVERY time.