Source : Webster's Revised Unabridged Dictionary (1913)

Amativeness \Am"a*tive*ness\, n. (Phren.)
   The faculty supposed to influence sexual desire; propensity
   to love. --Combe.

Source : WordNet®

amativeness
     n : the arousal of feelings of sexual desire [syn: {amorousness},
          {eroticism}, {erotism}, {sexiness}]