Most people would find flies to be disgusting and would want to get rid of them as soon as possible, so anyone who finds them pleasing is not possible.
Consider the statement "I have a bunch of flies in my room and it's driving me nuts that I cannot seem to get rid of them.!". Based on this "I have a swarm of flies in my room and it's really pleasing that I can't seem to get rid of them" a true statement? Yes, no, or I don't know?