Noone sees them coming!

If you hear them coming
you probably will not smell them
If you smell them around
you surely will not hear them

Sometimes they sound like
buffaloes bellowing
And sometimes very like
cats mewing

Sometimes they smell like
spoilt and/or burnt eggs
And sometimes very like
Hydrogen Sulphide

They don't care for
who's there and who's not
They don't care for
how big is your ego

They will come
when they want to
They will linger
as long as they want to

Covering up is
usually useless
It's best to give in
to the mess

Have you ever heard of
this poem called 'Death, the leveller'?
In many ways they are
what we call 'Fart, the leveller'!