desirability          
noun [ U ] uk/dɪˌzaɪə.rəˈbɪl.ə.ti/ us/dɪˌzaɪr.əˈbɪl.ə.t̬i/
 性感
the quality of being sexually attractive
  She was aware of her desirability. 她清楚自己很性感。 
  欲求;希求
the quality of being worth having
  Too much emphasis is placed on the desirability of being thin. 人们过于追求身材苗条。