From The Art and Popular Culture Encyclopedia
Body worship is any practice of physically reverencing a part of another person's body, and is usually done as a submissive act in the context of BDSM. Typical kinds of body worship are muscle worship, foot worship, pussy worship, cock worship (or Oral servitude), and ass worship. Body worship is popular among people of all sexual orientations and gender identities.
Usually accompanied by prostration, re-enforcing a sense of inferiority, a "sub" generally licks, kisses and sucks their dominant's body part, and is not allowed to touch it in a more conventional way. The aspect of erotic humiliation is perhaps appreciated by bearing in mind the commonplace phrase "kiss my ass."
Worshiping a body can also be done because the worshiper is in awe of the body part and wishes to praise that beauty. Although encouragement may be provided, verbally or by spanking, body worship is typically received more or less passively, the worshipped party aloof. Face sitting and smothering are forms of body worship which differ chiefly because of their aggressive approach.
Body worship is a common theme in the work of Japanese fetish artist Namio Harukawa.