Why did Gulliver hate the Brobdingnag flies?

is 's satirical novel
about life in England in the early 18th century. Gulliver makes several journeys over the course
of the novel, and in each place Swift focuses his satirical attack on a different facet of
English life.

Gulliver's second voyage takes him to a place called
Brobdingnag, where the people are hugeabout ten times taller than Gulliver himself. The
Brobdingnagians have a near utopian society in which people freely share the fruits of their
labor. However, things are not so perfect for Gulliver, who must deal with the problem of being
so small. One of the unexpected problems he encounters in Brobdingnag are insectsthey are huge
to him. At one point he is accosted by a fly. This wouldn't seem like anything to us, but to him
the fly is the size of a bird. He finds it disgusting and it won't let him be.

It's up for interpretation as to what Swift was up to with the fly. Does it symbolize
something, such as the idea that even in an almost perfect society some will have to suffer? Or
is it merely an amusing interlude in between Swift's attacks on British
society?