Rule 34 Dev - animated animated_gif ankle_cuffs areolae arms_behind_back belly bondage book bouncing_breasts bound_to_desk breasts brown_hair cervix chalkboard classroom closed_eyes desk dildo dildo_sitting display dotborn drawing drill female forced_presentation gender_symbol humiliation impregnation kneeling large_breasts large_insertion loop machine mechanical mechanical_fixation naked navel nipples nude on_desk on_display open_mouth ovum pixel_art presenting public public_nudity pussy rape restrained ridges sex_education sex_machine shiny_skin sitting sitting_on_desk spiked_dildo spinning stationary_restraints stocks stomach_bulge tongue tongue_out underboob vaginal vaginal_penetration womb|3136241432