Just a little look into one of my girl's abilities.

Epz's species have highly developed receptors on their toungues, incredibly sensitive to stimulants to the point they normally pass information through tongue on tongue contact. Evolved by being a society that is developed perfect nutrition cubes, 1inch by 1inch blocks that contain a days worth of nutrition in a single gulp, but ultimately TASTELESS! So when she crash landed on the planet ERF food with flavor that gave weird tummy feelings and tongue tingles opened up a whole new culinary avenue for her to explore.

Hence the waistline

Hence the aversion too both long spicey bois and bitter yellow nemesis.