The Collaborative International Dictionary of English v.0.48:
Amorousness \Am"o*rous*ness\, n. The quality of being amorous, or inclined to sexual love; lovingness. [1913 Webster]WordNet (r) 3.0 (2006):
amorousness n 1: a feeling of love or fondness [syn: amorousness, enamoredness] 2: the arousal of feelings of sexual desire [syn: amorousness, eroticism, erotism, sexiness, amativeness]