Soho theatre, LondonFearlessly provocative and covered in gunk, Garland delivers a wild and elusive show about queerness and carnality 'It's divisive." Well, you'd think so, a "kink performance art" clown show with nudity, bodily fluids, worms and, er, Gwyneth Paltrow. And yet Primal Bog left last year's Edinburgh fringe with praise ringing in the ears of its creator Rosa Garland. To the degree that Garland is a winn…