“Blood Brothers.”

The hits just keep coming from Christopher Ciccone’s tell-all book on his pop star sister, Madonna. A fresh round of gossip blips include this curdling detail: “Madonna’s first husband, Sean Penn, once cornered Ciccone, pulled out a jackknife and insisted, ‘Let’s be blood brothers,’ then sliced open both their thumbs to seal the deal. Years later, Penn approached the openly gay Ciccone, mentioned the ritual and asked, ‘You don’t have AIDS, do you?'” Meanwhile, Madonna’s “estranged” hubby Guy Ritchie’s alleged homophobia again gets special mention: “Guy Ritchie is a homophobe whose heterosexuality ‘swells noticeably’ in the presence of gay men.” Kinky! [NY Post]