Domestic Violence Isn't Real. Because if they were domesticated they would stay quiet.
I'm not sure that I'm comfortable with that type of joke.
No, it's not a joke. Domestic violence is something that only happens when people won't stay quiet and accept the violence of their partners.
It seems like you've never known anyone who's been involved in an abusive relationship. When I hear stories about people who are being abused by their partners, I get sad and wish I could help them. Please be careful making jokes about domestic violence because the person you are telling the joke to might be a victim of abuse and your words could make them feel even worse.