Says who? Just because a behavior or whatever is being examined by feminism doesn't mean you're required to do or stop doing that behavior in order to call yourself a feminist.
That's ridiculous.
It simply means it's being examined through a feminist lens to weigh it out against various schemata: tradition, culture, benefit/harm analysis, alternatives, necessity, etc.
To call yourself a feminist and be a "real" feminist means you particilate in that examination and juxtapose those discussions against your own life and then make your choice to either continue or abandon said 'thing' based on your values, whether or not it serves you, etc.
The point is, it's now YOUR choice.
And not something you did just because of inertia, expectations, someone else's beliefs, whatever malcontent bug someone else has up their ass, because you felt pressured to go along. Whatever.
To be a feminist means you're dedicating yourself to becoming your own person, and not what that obnoxious, omnipresent, ubiquitous thundercunt we call 'society' wants and demands you to be.
In my process of examining shaving, I learned some things about myself. I recalled some important things I had forgotten. Some painful things. I was able to resolve that pain. It reduced some anxiety I didn't realize I was carrying around in regards to my own relationship with my daughter. Our relationship was strengthened because of it, because of boldly going through this process of examination and self reflection.
My ultimate decision was to abandon shaving. Yours might be to continue the practice.
So fucking what? As long as we have both done the examination, we're both REAL feminists.