A Locked Open Book

My head is my safe,

I can put into it whatever I wish;

 Remove what I wish;

Lock its contents away from anyone.

My heart is like a park:

Too many things can get in;

Not enough people to clean it out…

It just sits there for all to see…

 Except it's the elephant in the room no one points out…

There’s the park, needing some housekeeping,

Yet no one notices, let alone walks inside the gate;

Probably because I disguise it with clever metaphors.