A treat for her. Her
lover places two or more well lubricated and inspection gloved, fingers, into her anus, then firmly massages her G-
spot and it's related squirt glands, through several thick layers of muscular vaginal and anal tissue, against her pubic bone. She goes off like a gun if you do it right!
Don't spare the lube! See also asspuppet, cornweasel, etc.