why?

why do people think that death is a stranger?

you have always known him,
death is your best friend.
he breathes through you like a poem,
or a riddle,
a person to talk about, when conversation lags
annoying, yes, like most best friends are
and rather single-minded.
but who can understand you better
drunk, or sober, popular or pensive,
he has seen it all before. And once
you realize
he's there, it's rather hard
to keep him off your mind.