He's posing for charity:
More than 18,000 service men and women have been injured in the war, and more than 2,600 have given their lives for our freedom. Many of the wounded are young and face an entire lifetime of “healing” and coping with disabilities. Regardless of partisan or political views, our country recognizes the need to aid our service men and women who endure great sacrifice to protect our freedom.
You may have heard about it or seen it in the media, now you can order the 2007 America's Heroes Reconnaissance Marines Calendar for yourself and/or all your friends. 100% of the proceeds go to our wounded heroes and their families as directed by those who have been awarded the Purple Heart.
(Found via Racy Thoughts and A Distant Soil)