I believe this is Terry Torson aka Juliano Mendes. I'm not sure what this particular gif is from but he has worked for William Higgins, Big Daddy, Czechhunter and Bareback Casting. He was also at Bel Ami as Hoyt Kogan.
I think dman9924 is right.
And so are you; that is beautiful.
I always wonder about porn models who strip off everything but their watches.