simple one for the boys

I am a secret you keep and never give away
Element of continues darkness
Yet you never fail to outline my kindness
Not a necessity but advised
I am like vitamins
That’s how you consume
No prescription for peculiar
Just reach over the counter
Not advised to go a day without it
On a mornings that you do don’t mind it
Just gonna be still on a shelf
You seem to know how to find me
Like a scarf a blanket a sleeping bag
Never a priority but so happy you have it.