First, this man usually likes to make fun of color, and making a yellow expression is just a joke, that's all.
Second, this man may have bad ideas about women. Send a yellow expression to explore the road and see what female colleagues have to say.
Female colleagues don't resist yellow expression, there should be three kinds of mentality:
First, I know that this man likes to play some colorful jokes, so he won't care. It's all a joke between adults.
Second, female colleagues are annoyed with this yellow expression. Because of her colleagues, she pretended not to understand. As long as she stayed away from this man in the future, there was no need to make a mountain out of a molehill about it.
Third, women have a warm feeling for their male colleagues when they see yellow expressions, but such women are rare.