So they can suck all your blood by ice
Another Answer:
They are attracted to the flakey dead particles of skin on your body.
The reason that flies always land on people is because to a fly, a human is a food source. Flies eat dead skin, salt, oils, and anything else that they can.
Yes they land anywhere and carry that with them. Also flies throw up everytime they land.
They land on the ceiling because theyr'e attracted to the light
dragon
Flies don't sit they fly around and land of stuff not sitting
No
Depends on what they're landing on. If they land on what they see as food, they secrete a solution from their mouth that helps break down their 'food'. if they find a dead body, they do what I just said or they will lay eggs if they're female.
Flies themselves don't kill people, but some flies may carry diseases that do.
on kimikos big burnout fore head
Flies may land on a person to seek warmth, moisture, or food residue. They might also mistake the person for a potential food source or breeding site.
No, people don't use land, land uses people
mostly flies or insects that land on it's web. =]