Well, we genetic females masturbate too!
When I do I select a toy or two, perhaps even mount my Sybian, and away I go.
Depending on the orientation of the moment, I will select some "visual aids" of other females/lesbian sex; men/straight sex; shemales, especially Asian, or related to my growing turn-on with castrated males or shemales...go figure.
As one of my GF's puts it..."Well, at least you're an equal opportunity sex maniac!"
Of course, she sometimes shares my "hobby" with me.