"Bourget’s definition may be satisfactory: “There exists a mental and physical state during which everything is annulled in us, in our thoughts, in our hearts, and in our senses. . . . I call that state love.” Physical love in Stendhal’s sense may appear as a separate variety of love only if we assume a process of dissociation and a change to a primitive state. It is normally an integrating part of passion-love. Taken on its own, it forms the lower limit of passion-love, but it always retains that intrinsic quality.
In general it is important here to establish the fundamental difference between our concept and that of the positivists. The difference lies not in the physical or biological interpretation, but in the root meaning of sexual union; for otherwise we both see in that union the essential end and conclusion of every experience based on mutual attraction between the sexes, the center of gravity of all love."
-Eros and the mysteries of love by Julius Evola.