A Bottlehead Genesis (short form):
In the beginning darkness was upon the face of the world, and Doc said "Let there be SEX!" and lo, there was SEX.
And in the fullness of time, SEX begat AfterGlow.
Upon a time, AfterGlow begat BeeGlow, and ParaGlow.
And in later years, BeeGlow and ParaGlow begat ParaBee, which begat the Paramount twins.
In their old age, SEX and ParaGlow begat Paramour, which begat Stereomour.