The discussion was all about something all too familiar to many people, especially me: the constant battle against fruit flies. Sure, there are worse problems to have in life, but there’s no denying that fruit flies are irritating. Why Fruit Flies Are On Banana SkinsApparently, fruit flies lay their eggs on the skins of bananas, so we ultimately end up bringing them home with us from the grocery store. I let the bananas dry on a kitchen towel, and then placed them in my fruit bowl. Rinse your bananas from now on, and say farewell to fruit flies!