There's truth in advertising : "On page 16, the tasty-looking doughnuts and cupcakes had an even bigger fan than a hungry five-year-old - a small fly can be seen surveying his fiefdom on the centre cupcake."
It is true. We have flies. We didn't used to have flies but now we do. We used to be famous for fly swatting and it is why we wear thongs..they are fantastic fly swats. If food is out, the flies will find it. It's real. It's what flies do. Photoshopping it out doesn't change reality. I cannot imagine they got up that morning and planned a photoshoot complete with a fly on their cup cake. It's not normal practice. As it stands, it's funny.