autoerotic       
adjective  formal uk/ˌɔː.təʊ.ɪˈrɒt.ɪk/ us/ˌɑː.t̬oʊ.ɪˈrɑː.t̬ɪk/
 自体性行为的
involving the use of your own body and imagination to get sexual pleasure
  Scientists are investigating how yoga and related practices can foster autoerotic bliss. 科学家们正在研究瑜伽和相关练习如何促进自体性快感。 
 See: autoeroticism
 - More examples
 - I like thinking, which is autoerotic, the mind being part of the body and thoughts.
 - Masturbation is a common autoerotic practice.
 - Experts concluded the man’s death likely was not due to autoerotic asphyxiation, but a murder.