I believe the term "male feminist" is necessary because if male feminists just call themselves feminists in an anonymous environment online, they will be presumed female and that actually hurts the feminist movement because if feminists are thought only female that opens the door for the "angry woman" stereotype to continue. Male feminists are sometimes annoying to me if they are trying to be THE BEST feminist or win the internet by being a male feminist without just checking their privilege and pushing for equality like you do if you are truly a feminist. But they do deserve a small badge of honor for standing up for social progression and bringing attention to the fact that they are not the same as archaically minded dudes they may look like. I attend to assume it less necessary for younger people and more necessary for baby boomers and greatest generationers. But most of all on the internet where if you don't say exactly what you believe people will assume everyone thinks like they do in small groups that don't know they're not up to date.