A slow-burning swear, this one. I was shopping for some household items and came across some packs of socks. One lot were advertised as kids' warm cotton/wool mix socks, in the colours, white, light blue and dark blue. The lot next to it was advertised as girls' socks, pure cotton, in the colours, white, pink and dove grey. Why?!
This time, I'm not whinging about sorting genders by colour so they can be conveniently put in the washing machine. What jumped out at me is that the girls socks are thinner and less practical, which is often the case with girls' clothing. Although it's generally advertised as boys vs girls.
(With thanks to Ailbhe and other parents of girls for making me aware of this issue.)