Answer:
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
What goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all.
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
It is by nature, soft as silk; A puffy cloud, white as milk; Snow tops this tropical crop; The dirtiest part of a mop
I have two eyes in the front and a lot of eyes on my tail