Stephen Graham (AP Photo/Chris Pizzello)Stephen Graham’s hit Netflix series Adolescence sparked a global debate on toxic masculinity and shone a spotlight on the sometimes stilted relationships that can exist between fathers and sons.Now, the actor is imploring dads everywhere to pen a letter to their boys – and he wants to publish it.Stephen is working with psychology lecturer Orly Klein on a new project asking fathers to write a letter to their sons about what it means to be a man.These letters, including one written by the Emmy winner to his own son, will be included in a landmark book called Letters to Our Sons, to be published next October.The project is an attempt to keep the conversation going on masculinity and what it means to be a man nowadays – especially given a rise in misogynistic behaviour among some boys, fuelled by certain online groups.