Girls == Windows && Boys == Linux

Girls and Windows

* Both have a great UI.
* Both consume large resources and do less work.
* Both crash unexpectedly.
* Both are not easily portable on different architectures (environment).
* Both can't work on low resource architectures (environment).
* Both are costly to maintain.
* Both give mostly unexpected outputs.
* Both their working often contradicts with their documentation.
* Both are easily prone to viruses (rumors and doubts) and they (viruses) do spread very fast in windows based networks.
* In spite of all above disadvantages, both are liked.

Boys and Linux

* Both have an average UI.
* Both are robust.
* Both are highly secure.
* Both can be easily modified to support new concepts/features.
* Both are efficient.
* Both are easily portable to any architecture (environment) no matter how low the resources are.
* You can easily guess the output for your input (in Linux just open its code, for boys they are mostly transparent by nature).
* Both provide large support for development (work environment).
* Both are poorly documented.

http://www.marcofolio.net/other/girls_windows_boys_linux.html