One of my all-time favorite W.A.S.P. songs... which is basically every song from the first album. Take any song from that LP and I'll say “It's my favorite one” :) Still, “Sleeping” is kind of special since it's such a beautiful and unusual power ballad and I even have a friend who chose it for her first wedding dance with her husband a few years ago (hi there, Xeniya!)
As for the bass part, it's one of those songs everyone plays as she/he wants. I found many versions and they all sounded nice yet still, I wasn't convinced that it was really the original Blackie's part on the album. The song was also played very differently live. So I did as I always do – I listened to the original song many times and finally played what I heard. I hope you'll like it!