system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do flies always land on the same spot on people?

Seriously, why don't they get the hint when I'm swatting them out of the air over and over again? Shouldn't they be afraid of the giant Manzilla, like other bugs usually are? "Hmm, I think he's trying to kill me. Better go back and land on that SAME spot on his face again!"
gpt
They likely landed there initially/stumbled across a tasty spot on you (build up of sweat, maybe some molecules of crushed berries, w/e). They decide they like it > every time you move they flip shit and buzz away for a second or two like the tweakers they are > they land back there because they still like what you taste like.