Article continues below advertisementAmanda Seyfried shared a bizarre behind-the-scenes story from the set of her and Channing Tatum's 2010 film Dear John."He and I effed with each other the entire movie in a super, super fun way," Seyfried, 40, said about her dynamic with Tatum, 45, in an interview published by a news outlet on Thursday, January 15. "He's very, very funny, and we had a great time."Article continues below advertisementAmanda Seyfried Recalled Bizarre Story Involving Channing TatumSource: MEGAAmanda Seyfried recounted a story that involved Channing Tatum 'peeing on her leg.