I am granite-

Cold yet smooth
But hard to the core.
I only break
When met with a blade.

She is moon sand-

Cool to the touch
In the most pleasurable way.
Soft and smooth
She crumbles instantly.

You are selfish-

Expecting a girl to melt
Instantly for you
Digging deeper
Until you get to her core.

Well, lucky for you
With her
You can build sand castles
And shape her into any mold
While I stand strong
Because as selfish as you are
You aren't the blade;
That will be someone worthwhile.