Being into the sleaze/glam scene, porn has always been a part of metal for me as most of the stuff I listen to and watch is all sex & sleaze driven!
It goes back a long time! Every seen Rhett Forrester's "Assume The Position" video clip? Motley Crue's "Girls Girls Girls", Scorpions' "Rhythm Of Love" with those FOXY chicks in the fluffy pink g-strings, etc.
There's a strip joint in Melbourne called Dallas Dancers that almost became a strip metal club! The idea was for it to be like The Cathouse but with strippers and podiums! It fell through but the club still plays Poison, Motley Crue, Bon Jovi, Warrant, Van Halen, Aerosmith, KISS, AC/DC, Alice Cooper, Def Leppard, even Stryper (!!!) through the PA half the time. Once they even played a CD with Sic Vikki, King Kobra, Bulletboys, Talisman, Vain, Shotgun Messiah, Danger Danger, Ratt, etc! And at 11pm every night they have an "all girls totally nude on stage together" Super-Strip to Girls Girls Girls!
So to me, sex/sleaze & metal has always kinda gone hand in hand!!