We were all told this by a parent or friend as a kid on a summer day when a fly landed on our hotdog. I still ate mine, but was grossed out for half a second and still think of it every time a fly lands on me or my food.
Based on our research, this tale is right up there with the ‘hook on the door handle’ urban legend. However, don’t stop reading quite yet. There are some gross facts about fly landings that you should know. So before you say “I told you so” to the person you had this argument with I am going to drop some knowledge.