Sanity Check: Interior Diamonds for Your Interior Idiot

Hello to all my new, current, former, and wannabe smartypants university-type peoples!  Welcome to another edition of the Sanity Check on TPP.

Have you ever looked at something someone has just purchased or is wearing, and thought to yourself, "Now what the hell kind of function is that piece of shit going to serve?"  Well, if you have, you're definitely in the right place because...

This week's subject: Interior diamonds and other useless adornments and do-dads.