December 14th: Pockets
Men have pockets. Women have bags. These are the general rules for carrying stuff about. Indeed, I found out recently that some commercially available women's trousers don't even HAVE pockets on them. The simple fact is that, whether they know it or not, women are missing out. My solution to society's great oversight is Nockets, which I have invented. The stick on pocket with a glue so strong you can even wear them whilst naked (hence the name). Seriously, you'd not be able to get them off again.