Sex is indeed close to binary, but it's still difficult when there might be someone in that room who is one of those 'hermaphrodites and things' and she'd have no clue. I want her to get a grip on that.

As gender can be considered a social construct, in the past it *was* the case that you could write a list of 'masculine' and 'feminine' traits and expect the men you knew to display traits from the M list only and vice versa. like 'emotional/sensitive/nurturing' vs 'calm/rational/decisive'. That's not how people *are*, it's how they learn to be because it's expected of them. That has changed a lot these days, and those lists don't work like that any more, but there's still some way to go. More later, I have another lecture in five minutes.