Vatsyayana didn’t focus a lot on oral sex or “mouth congress” in the
Kama Sutra. Apparently it went against moral teachings, so was considered an improper practice.
However, that didn’t stop people from enjoying it. As Vatsyayana noted, “For the sake of such things courtesans abandon men possessed of good qualities, liberal and clever, and become attached to low persons, such as slaves and elephant drivers.” (
Kama Sutra, Part II, Ch. 9)
Mutual oral sex—69 as it’s commonly called today—was called Kokila, (Congress of a Crow) in Vatsyayana’s time. Today you can call it whatever you want as long as you find ways and means to enjoy it, and Liberator Shapes with their myriad combinations will give you more than you can imagine.