Rule 34 Dev - 2019 2boys 4_fingers alien animal_genitalia animal_penis anthro balls biped disney duo erection experiment_(species) fellatio feral fur gay hellfox hi_res horn knotsosfw lilo_and_stitch male male_only mammal monochrome open_mouth oral penis sharp_teeth simple_background sitting smile stitch teeth tongue tongue_out yaoi|3542422784