"Typically, the Kama Sutra and/or Ananga Ranga are referenced and even referred to as 'Tantras.' In actuality, these works are simply sutras on love and sex and are unrelated to the traditional Tantras ." 9
Other works depict less platonic relationships. A Ming Dynasty rewriting of a very early Zhou Dynasty legend recounts a passionate male relationship between Pan Zhang & Wang Zhongxian which is equated to heterosexual marriage , and which continues even beyond death.  The daring 17th century author Li Yu combined tales of passionate love between men with brutal violence and cosmic revenge.  Dream of the Red Chamber , one of China's Four Great Classical Novels from the Qing Dynasty , has scenes that depict men engaging in both same-sex and opposite-sex acts. 
Human Rights Campaign
National Gay & Lesbian Task Force
Blofeld, John, Bodhisattva of Compassion: the Mystical Tradition of Kuan Yin , Shambala, Boston 1988.