Supernatural story search

I was hoping someone on my flist may be able to help me locate a story. I don't remember the title or author, but what I do vaguely remember of the story is that Sam and Dean are trapped somewhere and Sam has to have sex with some kind of statue that represents a fertility god so they could escape, like he fucks himself on the statue's cock type of sex. It was hot.

I'd appreciate any and all help in identifying the story.

Thanks!