O3>C
Female masturbation. Tilt your head to the left.
Other versions are:
OGC: male masturbation
oec: male leftie masturbation
O3GC: futanari masturbation
Other versions are:
OGC: male masturbation
oec: male leftie masturbation
O3GC: futanari masturbation
It is necessary for a girl to O3>C.