There’s something mesmerising about watching a good mimic. And Aimée Kelly, who plays fetish photographer Irina Sturges in Soho Theatre’s Boy Parts, is a very good mimic. Across the 80 minutes of this one-woman performance, she inhabits the bodies of dozens of characters, each a carbon copy of the worst kind of person: oleaginous city bankers; shrill, hysterical twenty-something women; ‘Andrew Tate-core’ men.