It's the message "It's Not Ok" spokesperson Vic Tamati is spreading as he speaks with inmates at Hawke's Bay Regional Prison.
"It really saddens me that we have to wait for organisations like this "It's Not Ok" campaign to come in and run programmes."
Mr Tamati endured regular beatings as a child - and became a violent father himself.
"The lightbulb moment that I had was when I bashed up my eight-year-old daughter, and realising that in that moment it could've been worse, I could've killed her."