"I am a man with no muscles," proclaims Jonny Benjamin, flexing his biceps for the camera in in a new campaign video made in support of male suicide prevention charity CALM (Campaign Against Living Miserably). "These non-existent things are my 'muscles.'"

Benjamin, who began campaigning on mental health issues after 2013's #FindMike, a public search for the man who talked him down from a suicide attempt on Waterloo Bridge five years earlier, suffers from schizophrenia and bipolar disorder.

Launched at the beginning of Mental Health Awareness Week, Benjamin's latest video, #IAmAMan, features the 28-year-old revealing to camera his greatest insecurities – from hating his beer gut to remembering the shame at hitting puberty earlier than his friends at school – in the hope that men will learn to loves themselves.