The sad thing is, one of my friends was serious about something like this.
The IM conversation went something like this:
Him: whats a cache?
Me: (I copy / pasted the definition off the webberbutts) A cache (pronounced CASH) is a place to store something temporarily. The files you automatically request by looking at a Web page are stored on your hard disk in a cache subdirectory under the directory for your browser.
Me: Why do you want to know?
Him: theres an option thingy in ff to clear it but i dont no if i have one
Him: why whats rong?
Him: hold on im trying to download one