As for that teasing, cheeky-sounding title, it’s both ironic and instructive.
Here is a film for every 16-year-old still finding their real identity between their brash friend-squad front and the most diminishing taunts of their self-image, and for every older person who remembers that, and hasn’t the heart to tell them it may be an ongoing search. “How to Have Sex” is equally likely to endure comparisons to Charlotte Wells’ “Aftersun,” last year’s great British debut about regimented package-tour fun bringing out the latent melancholy of troubled holidaymakers - again, a reference point that captures some sense of the film’s brightly dilapidated milieu but not its very specific, vividly evoked anxieties.