I've found a lady can "get away" with using a knife in public that would raise eyebrows if a guy would use the same knife.
People expect well-dressed, classy, educated women to behave in a certain way. I gave my wife a Spyderco Cricket for EDC in her purse. She had to use it once on a train to open a package of snacks when the train broke down for several hours. This was in full view of everyone. I asked if anyone said anything. She said she expected someone to say something, but no one ever did.
On the other hand, many people think well-dressed, classy, educated men are simply overgrown boys full of mischief. If I pull out my own Cricket in public, it gets commented on. I've heard, "Hey can you KILL someone with that thing?" more than once to know not to use it in public. People are fascinated with the curved blade.
I've found I need to deploy a much smaller knife. I carry a Victorinox Midnite MiniChamp II and a Spyderco Jester. The mint-green color of the Jester, along with its diminuative size, does not attract attention, other than someone perhaps saying, what a cute little knife. Same with the MiniChamp.