Perhaps a misunderstanding due to societies recent attempt at broadening the concepts of sex and gender
No, not at all.
There’s no “mudding the waters”, he’s just ignorant of what “sexual dimorphism” meant, and not clever enough to check it before leaving a most ironic comment about “making it sexual”.
You mean “muddying the waters”, by the way. Another example of your ignorance.
I’ll stick with what can be tested, reproduced and proven
Don’t lie. You’re very much writing like a “only two genders and I don’t see how ‘sex’ and ‘gender’ are different despite there being a very clear scientific consensus on it” - guy.
You could have at least Google searched it before attempting a gotcha, there are three methods. One doesn’t actually change the color, but the other two do.