self-indulgence       
noun [ S or U ]  usually disapproving uk/ˌself.ɪnˈdʌl.dʒəns/ us/ˌself.ɪnˈdʌl.dʒəns/
 自我放纵
the act of allowing yourself to have or do anything that you enjoy
  Rarely have I seen two people work together so effortlessly and with so little self-indulgence. 我很少看到两个人如此毫不费力地合作,而且很少自我放纵。 
 Why should they be made to feel guilty for a little self-indulgence?  为什么要让他们为一点自我放纵而感到内疚? 
 See: self-indulgent
 - More examples
 - There is still a curious assumption that having a child is the ultimate self-indulgence.
 - The Roman poet Livy wrote that greed and self-indulgence led Romans to dangerous excesses.
 - It can become difficult to draw the line between what is best for the pet, and what is pure self-indulgence.