Vanilla sex
Vanilla sex is a term that refers to standard or normal sex. Different cultures, subcultures, and individuals have different ideas about what constitutes vanilla sex. Often it is interpreted as sex that does not involve such elements as BDSM, kink, or fetish activities. Amoung homosexual men it sometimes implies that the activity is non-insertive (i.e. interfemoral intercourse, manual stimulation, frottage etc.)The term 'vanilla' derives from the use of vanilla extract as the default flavoring for ice cream, and by extension meaning 'plain' or 'conventional'.
See also neapolitan.