HOW TO HAVE SEX reviewed by GREG KING Director: Molly Manning-Walker Stars: Mia McKenna-Bruce, Lara Peake, Enva Lewis, Shaun Thomas, Samuel Bottomley, Laura Ambler. What a salacious eye-catching title! But rather than a documentary this is another in the cycle of coming-of-age films featuring a group of horny teenagers on a sex and alcohol fuelled holiday in a sun-drenched exotic location. It …