How do I explain in business terms ASP.NET Skinning and Theming to my customer?
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I'm trying to explain to a customer how we can "theme and skin" their new website.

Being a computer person trying to talk to a bsuiness person, this is more difficult than it sounds.

I have so far described how colours and things like that can change.

How can I describe better to a business person why themes and skins is a good idea???