What should men's backpacks hold?

What should men's backpacks hold?

I would like to make some personal comments here: The purse is put in his trouser pocket and not in the backpack, otherwise it will look very good when you take it out of the bag when paying the bill. MP3 or IPOD like put the bag well, the phone is casual, see how easy you think. It's best to have paper towels in the bag. They are often used when you go out. Girls don't think you're a turtle. They just think you are very considerate and love to be clean. If you like sports, you can also put this sports magazine in your bag, otherwise you will appear to pack space. But do not put too much full, do not say tired of carrying their own, girls will feel that such a person is very troublesome.
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