Orgasmatron was definitely a Lemmy tune and not a collaboration or rip from Sepultura who covered it later. I have a Motörhead rehearsal tape in which they can be heard jamming. Lemmy can be heard playing the bass riff over and over again, the ending used on the final studio recording is somewhere in the middle of the song where the rest of the band can be heard trying to take the song elsewhere. I stayed at the band's house when I saw Lemmy's handwritten lyrics to the song lying on the floor next to a video on tank movements in the Ardennes. I asked him if it was named after the device used in Woody Allen's movie, The Sleeper, but he said it wasn't. He said it must have been just buried somewhere in his mind as he was surprised by the reference. We then talked about another device used in Tommy which Tina Turner emerged from as The Acid Queen. Of course, he then commented that she had fucking great legs, was a fine piece of ass but her husband Ike was a controlling bastard.