Why do flies come into the house?

Question

why do flies seem to wait to fly into the house? there are millions of square miles,woods etc for them to roam ,but they would rather find ways into your house hence the term "house fly"?

Answer 1

Believe it or not, most of them really do roam the wildness, still, a house is an attractive place with food scent and heat and light.

Answer 2

Flies fly everywhere, your house is in that somewhere so they fly there also.  How about, flies fly in the air, your house has air in it, so flies fly there.

Answer 3

They have some attachment with humane body. due to some particles which are deposited on skin. They are more social. When you go for walking in the morning they welcome like good friends &remain with you  on face , nose &ears.