I was thinking about this in terms of products recently. Gendered products tend to move from men to women, but rarely the other way around. High heels, Chuck Taylors, motorcycles, etc.

Some products do move the other way but it is a slow process: massages, wet wipes (Dude Wipes anyone?), manicures, etc. But I think a good majority of products marketed to women have a much harder time crossing over.