Sentence:  And so we are back at <WSD>pansexualism</WSD>. It cannot, however, be too often insisted that, though Freud heavily emphasized the element of sexuality in human nature, he utterly rejected <WSD>pansexualism</WSD>, which he regarded as a travesty of his theory; and on many occasions he explicitly and energetically denied the equation of all instinctual life with sexuality. 
Meaning of the word marked with <WSD> tags:  The psychological theory that all human activity (mental and physical) is based on sexuality.