Kevin Costner's Pleat-Snake

Earlier today, a reader forwarded us a link to this picture (link not safe for work) of Kevin Costner's "bulge," and maybe we're a little unpracticed in the art of schlong-spotting (though we can spot a nipple through two inches of opaque cocktail dress at a range of thirty feet, look how hetero we are, etc etc), but we're totally at a loss for what we're supposed to be looking for here. If anything, we think we left off a couple of arrows.