Diddy Made An Escort Pee In Cassie's Mouth As She Choked, Says Prosecutor!

[Warning: Potentially Triggering Content] Diddy's trial officially kicked off on Monday . . . And we're already getting grim details of his alleged conduct we'd never heard before. And frankly we'd rather unhear . . . During opening statements in day one of the disgraced rapper's New York trial, Assistant US Attorney Emily Johnson detailed a graphic incident that had never gone public. We knew the Bad Boy Records founder is accused of various abuses of ex Cassie Ventura, but this is . . . JFC. Related: Kanye West's Cease & Desist Letter To Kim Kardashian Is A 'Hoax'! According to . . .