I’ve interviewed a lot of rappers over the years and always feel a little grimy when I find myself nudging them to repackage a horrendous experience as a juicy anecdote with which to promote an album. Some natural raconteurs are happy to play that game — 50 Cent can now tell the story of the day he was shot nine times with the fluency of Peter Ustinov on Parkinson — but many rappers are understandably coy, at least outside the recording studio, about sharing the gory details of their previous lives.