This image is Bill and Emily from Michael Rosen's book Vanilla Sex.  You can get a free download of the entire PDF book at www.michaelrosen.com. Select "Vanilla Sex" under GALLERIES in the left column, then click on "downloadable PDF" on the Vanilla Sex page, and then click "Download" on the download page if you agree to the licensing terms. - Image by Michael Rosen
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Body Worship

It's more than just pleasing your partner, mistress or lover.  It is showing a reverence during the exploration of their flesh.