Complex sentence: Western culture (and many others around the globe) is filled with early myths of seduction by some form of mind control: the Sirens of the Greeks and the witches of the Middle Ages both had a hypnotic aspect in their sexuality.
Split into simpler sentences: Western culture (and many others around the globe) is filled with early myths of seduction by some form of mind control. The witches of the Middle Ages also had a hypnotic aspect in their sexuality.