Levi Johnston -- Wet & Naked for $10 a Pop

Levi Johnston's naked body is now considered a pay-per-view event.

This morning, DirectTV started charging $9.95 for "Levi Johnston Playgirl Shoot" -- a behind-the-scenes special showing the father of one in various states of Palin-unapproved undress.

It's unclear if Levi is gettin' any additional money from sales in the back end ... but he definitely shows his.