Ayoni
Ayoni is non-vaginal sex in Hindu culture. The concept of ayoni is broad and can include oral, anal, and manual sex, intercourse with other animals, and forms of masturbation.
Hindu law books tend to prohibit ayoni, but epic narratives and Puranas, on the contrary, describes the birth of heroic children or even gods from this kind of sex. Sometimes such a contradiction can be found even within the same text, such as in the Mahabharata. Thus, ayoni is presented either as impure or as sacred. This inconsistency can be explained by the fact that normally taboo practices can be sanctified by ritual contexts.