Could be, I hadn't heard of pinafores before.A pinafore is a type of apron isn't it?
Basically, if @suspendedreason hadn't started this thread, the gender ratio of forum users would probably be pretty close to 50:50 by now.Yeah a phwoargh thread, not good.
Probably all that needs to be said is that the pinafore evokes prim domestic work but is subverted in this case by the shortness of skirt and the hotness of the models.
It could be read as women being subservient and/or a return to “traditional values“.