Please don't take this personally but honestly, how does smiling have anything to do with Feminism also this is the first time I've heard of some odd conspiracy trying to force women to smile more.
I like everyone to smile, because when they do I feel better about confronting them and talking with them. I enjoy smiling because I feel people feel the same way.
I work in a business were appearance is everything, I am a Graphic Designer so I smile for my clients, I smile for my friends, I smile for my family. I smile even when almost everyday I struggle with my gender issues.
I have a lot to smile for, and I want that to out weight what I don't have to smile about.
Sure we don't always feel like smiling, but if we don't who will?