Trentham Monkey Forest enlisted the help of Marvin Gaye impersonator David Largie in a bid to get the endangered Barbary macaques ‘get it on’ at the end of mating seasonTrentham Monkey Forest enlisted the help of Marvin Gaye impersonator David Largie in a bid to get the endangered Barbary macaques ‘get it on’ at the end of mating season