Painting, My Mistress...

When the day is long,
Your embrace does soothe me.
We meet at the designated location,
Entwining ourselves in filthy bliss;
Each an equal in this congress.
However, ours is a complicated affair.
For in spite of all that I give,
You continuously take,
Never quite satisfied.
You selfishly yearn for more,
Until I feel I can give no more.
Alas, this does not last.
In time, I find myself alone,
Body and mind hungering for you,
And you forgivingly take me back;
Ready to begin our dance anew.