Hold onto your lunch kids. A new spec campaign from Sibling Rivalry for the a new Zune site (Zune-arts.net) features an eclectic artist that launches paint onto a canvas using his rectum. :Gag:

Sibling Rivalry, a directing duo that specializes in "viral advertising" with such brands as Samsung, Teleflora and Paramount as clients.

Sibling rivalry is Amy and Joe Matsushima. The latter said that:

"We see ourselves more as humor enthusiasts, and when we thought about doing something artistic, our minds went blank. We thought to ourselves, 'We can't do this! We can't be artists!' It was only when we found the core idea that we molded the artistic tonality of the piece from the ground up."

"I've always had a fascination with poop" said Amy.

Scatological jokes. Yeah. Me? I'm not a fan. Check it out above.

More: Digital Ideation And Intellectual Property: Richie Grantham