One said: The guys in our office tell the women to smile so often that now we’ve started responding with factual retorts. “Why would I smile while staring at an Excel document?” or, “If I smiled, I would spill the coffee out of my mouth.”

Don’t tell women to smile. Don’t tell women to be more cheerful. Don’t assume it is a woman’s role in the office to make everything more pleasant and lovely and soft. Don’t tell women how to behave so they’re more desirable to spend time around. Don’t comment on a woman’s mood, particularly if you’re suggesting that it is her female duty to be happy all the time. Don’t mirror the language of a real-life campaign against sexist men.