Do not begrude this,
For it is the fate of every man.
Yet it is feared,
And shunned in many lands.
Causes problems, and sometimes gaps,
Can hobble the strongest, and make memory laps.
What is this danger we all face?
For being a part – of the human race.

What happens when you throw a yellow rock into a purple stream?

What word can be added before or after these words to make a new word or phrase?

Surf, School, Room

I appear in the morning but am always there.
You can never see me though I am everywhere.
By night I am gone, though I sometimes never was.
Nothing can defeat me but I am easily gone.

What am I?

Gets rid of bad ones,
Short and tall,
Tightens when used
One size fits all.