He couldn't figure out what was wrong, until he looked at his email signature.
He was so intrigued by this whole situation that he decided to conduct an experiment for two weeks with Nicole: he would sign all his emails as 'Nicole' and she would sign them as 'Martin'.
Though Martin spoke to his boss about this, he didn't really believe him.
The thing he was really shocked about is that Nicole just viewed this as a normal part of her job, even though she knew she was being discriminated against as a woman (a reality that many women will know very well).
While Martin was praised for sharing his story, he did get some criticism, like the fact that it took him experiencing it to realise it was going on.
In a Medium post, Nicole pondered why her boss refused to believe this was happening.
"But I will always wonder. What did my boss have to gain by refusing to believe that sexism exists? Even when the evidence is screaming at him, even when his employee who makes him an awful lot of money is telling him, even when THE BOY on staff is telling him??
I never did figure it out. Instead, I quit and started my own business writing blog posts and web copy as a freelancer. In an office of one, I can finally put my walls down."
Ladies, we still have a long way to go!