3 boxs

Three boxes on my shelf
I know what's in them all
They're right there on my wall
Three boxes packed with care
What I put inside is supposed to stay in there
And there's these boxes on my shelf, three
One of them you'll never get to see
One is white and one is grey
The black one's put away
The one you'll never see
Sometimes when I'm alone
I'll look inside to see what all I've put in there, there
And in these boxes that I have
I put inside all that I want to keep but not to share
I leave them home you'll never see me take them anywhere
They're not for everyone to see
You can look at all these things
But you can't take them out
Once they're there they'll stay
I try hard to keep things out
Out of the box that's black
Once something's put in there
You'll never get it back