In intimate relationships, masculine behaviours can, in their extreme form, become emotionally controlling, abusive and violent.
Mewn perthynas agos, gall ymddygiadau gwrywaidd ar eu ffurf fwyaf eithafol, fynd yn ymddygiad sy'n rheoli drwy gam-drin emosiynol, neu ymddygiad camdriniol a threisgar.