What sort of person would stand naked and still for hours, often in agony? Nude models talk about how tough yet life-changing the work can be, even when posing for hen parties
The idealised male body has become bigger, bulkier and harder to achieve. So what drives a generation of young men to the all-consuming, often dangerous pursuit of perfection?
Self-harm can feel like the only way to get a handle on a world that seems out of control, says journalist and mental health activist, Harriet Williamson