It's not just those stupid fashion magazines, you know. In the seventies and eighties and even part of the nineties, commercials portraying people using some sort of household cleaner or domestic product tried to incorporate men doing chores around the house at least 30% of the time. Now they don't even bother; the person doing the chores is always female. What is that supposed to tell girls about their expectations around the house? Argh, keeping the place clean is not MY job alone. A vagina is just a vagina, it is not the reproductive organ of the menial task-doer.
And it's hard to avoid advertising, people. Even if you don't buy the products in question, advertisements still subconciously affect you. There have been a lot of studies about that.