Does your dinner taste better when it is cooked by yourself or when it is cooked by someone else?

My girlfriend and I often tell each other that we like our dinner better when it is cooked by the other.
My signature dish is chili con carne.
If I make it myself it is good, but if my girlfriend cooks it I gladly finish the pot; it is yummier!
Same goes for her: the scrambled eggs I put her, she thinks are much tastier than hers.
Are we alone in this?
Is it even the case with your signature dish?

Thanks, Jelly, for helping me dine!