Ray J Cracks Kim Kardashian Joke, Freaks Out at Dahmer Tattoo on TMZ After Dark Tour

Ray J's doesn't skimp out on the SKIMS jokes on our "TMZ After Dark" tour ... going into a full facetious meltdown when seeing Kim Kardashian's L.A. store. The rapper took the helm of the tour bus with DJ Mike T of VOX DJs backing him up Saturday…