A childhood belief about dangerous food

when I was little i used to believe that there were two kinds of mushrums good and bad i got this idea from my sister who played the mario games (thats where it came from) so i believed that if you ate bad mushrums you would shrink and if you ate good mushrums you would grow this was an observation i made when i saw my grampa eating darker mushrums (bad) and my mom always said he was shrinking then my dad ate white ones (good) and he was big and strong so it made sense but thats not it you see whenever we had some dish with mushrums and they were dark I was horribly scared that if i ate them i would shrink and I thought when i wasn't looking at them they would come closer to me and follow me and try to get in my mouth!!! so i would always offer mine to my sister and try to trick her into eating them and i would never leave the table this belief was proven wrong when i was at a party and they ordered pizza and i made the dumb suggestion to take the mushrums off because you shrink when you eat them and i did everything i could to try and prove it i got everyone to turn around then quickly look to see if the mushrums had moved this was at the age of 12 LOL They made fun of me ever since.