If it makes you feel better, I knew two people who were both committed foodies (an Italian and the guy who risked a $25k fine smuggling a leg of jamón ibérico through customs before there was a licensed importer), and then their son went through (IIRC) a 5 year stretch where he would not eat almost anything other than Wonderbread and Jif peanut butter. I am not exaggerating: their doctor actually pushed on vitamin supplements to avoid scurvy.