I don't really recall even hearing about a male gay couple involved, but I know a lesbian that beats her wife.....It's seemed off when I first heard about it but after a while you realize women can be abusive too.
I mean I had an abusive ex and she knew I would never hit her back.....Well, until I headbutted her for hurting my mom.
She would just start choking me sometimes and I mean her tiny hands weren't that powerful but then she starting hitting me with household items when I would laugh at her trying to hurt me.