Sometimes memes get so incomprehensible that you need to pull back layers and layers of context even to explain them to an outsider. Lisa Rinna M&M is one of those memes. This meme started with an Academy Awards advertising campaign from 2008, which features Real Housewives star Lisa Rinna and Joey Fatone on the red carpet rendered as horrifying M&Ms . Why are they M&Ms? Why do they look like that? Only God knows. This year, the Lisa Rinna M&M has begun to pop up in various memes on Twitter and…