He's trying to help you, you twat. He doesn't want you to be like him. It's like me telling my girlfriend I'll kill her if she self-harms. It's not male privilege, it's because I know that once you start, it's damn hard to stop and stay stopped, and I don't want her to be like me.
It's not male privilege. If anything, feminism is to make it so that neither men nor women feel they have to cut and then hide those cuts. He's not saying it's okay for him to cut and not you. He's saying "I've been there and I don't want you to cut, too."
You know what's hard? Being a cutter and having a significant other be a cutter too. Because you both struggle and can be triggered by each other. But at the same time, you can help each other. The trick is not to put responsibility on the other. Doing stuff like 'if you cut, then I cut' is harmful to the ability to heal and not relapse into cutting again.
However, if he had really said 'can't and won't tolerate it' then that's a problem with how he said it. Telling a cutter something like that won't help them heal. It'll make them hate themselves more and up the possibility of relapse as well as make them find different places to hide it. But it still isn't male privilege. Stop using that phrase attached to something like self-harm.
Oh and re: grey delisle cause damn she's not liked by a lot of tumblr not just SJW- The criticisms against her are fair. Her twitter and tumblr are full of her so-called 'jokes'. She's transphobic, sexist, misogynistic, and has been known to send hate to her fans.
She tried apologizing about it and uh...
Welp...
Now whether you should get up in arms about a joke about spousal abuse is up to you.