When you're best friend has a fling with your girlfriend you need to hear all the details... no matter how painful or how long a story it is. Closure requires context, and in this case a lot of it. How do you know what went wrong in your relationship, for example, if you don't know how glass is made or how early homo sapiens evolved?
Watch as Nick explains everything, and we mean everything, to Brian. Sorry, Clarissa, but it looks like BriTANick are the only ones who have actually explained it all.