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against_surface against_wall anthro anthro_on_anthro avian black_and_white breasts chalk chalkboard classroom clothed clothing conditional_dnp duo erection eyewear female genitals glasses gynomorph gynomorph/female humanoid_genitalia humanoid_penis information_board inside intersex intersex/female interspecies jessica_(eradragon)mammal monochrome mouse ms._hardley murid murine partially_clothed penis riding_crop rodent ruler scappo school sex sketch tail teacher whip