D4vd pled not guilty ... but do you believe him? Plus, the TMZ DC boys have taken The Hill by storm and the "Summer House" love triangle continues to dominate the Bravo-verse. So, we gotta ask ... "Summer House" alum Luke Gulbranson is a big believer in guy code and girl code ... telling us he doesn't approve of the way West Wilson  and  Amanda Batula went about getting together. Luke joined us on the "TMZ Podcast" and we couldn't let him go without asking him about the messy love triangle. As