69
69 sex position or slang for oral sex performed by two people on each other, simultaneous fellatio and cunnilingus. Can be practised by M+M, M+F or F+F. Called "69" due to the shape of the two numerals, which suggests the sex act.  Expl of F+F: the two girls were in a 69, licking each other's pussies. OR expl. of M+F: when a girl is sucking on your cock while u are upside down eating her pussy.