[user104658]

Originally Posted by Niamh.

Well here's where our opinions will veer off, I just can't see how sex and gender are different

They are different though by necessity or the term "gender" wouldn't even exist. I think there's a common misconception that gender "used to mean" the same thing as sex / the terms were interchangeable, and that "over time gender has come to mean" something different.

However that isn't the case and the term "gender" was created specifically to differentiate what would traditionally be considered male / female behavioural characteristics, from biological sex. Gender refers to behaviours, and ONLY behaviours, it (by definition) has nothing to do with biology.

In other words... if "sex" and "gender" were the same thing, then the term "gender" wouldn't NEED to exist at all.