Unfortunately, links to that particular website are blocked here. I managed to navigate to the page in question (I think). Is this the picture you were talking about?
Tumblr loves Phil Coulson. Maybe not quite as much as it loves Loki, but he does have some enthusiastic fans. (I know because I am one.) It's hilarious that Clark Gregg is using one of the Coulson "suit porn" pics as his Twitter avatar.