Ist “freie Liebe” Sittenlosigkeit?

A book by Emma Trosse, translated as Is “free love” immoral?, in which she self-identifies as being “without sensuality”. See pages 6-7: “einen Menschen – ohne Sinnlichkeit… Verfasser hat den Mut, sich zu jener Kategorie zu bekennen” [a person without sensuality… author has the courage to confess to that category].