You can do that on Amazon too, though only on consumable items where they think it'll be likely. If there's a "Subscribe & Save" link at the right, you can choose to make the order recurring instead of one-time, with intervals ranging from 1-6 months. Random example of a product that has such a feature: http://www.amazon.com/Gillette-Fusion-Manual-Cartridges-Coun...
Sure, but they don't have a nice GUI or good messaging around why I should use that to solve this problem specifically.
Also, in a world of politically correct egalitarianism I respect a company that has the literal and figurative balls to stand up and say, nope, this is for men (and go so far as to bake that assumption into the product name)
Can you point to a 5x markup on our site? Not a challenge, just a question because we try to stay at least remotely competitive to other online pricing. I'd be shocked to find product for 1/5 the price somewhere.
Shirts are a little different, but I use it for stuff like razor blades that are consumable.