FURVERT!

android anthro anus biped blue_eyes blue_sclera building building_insertion building_sex butt colored echidna fan_character female female_anthro genitals hair improvised_sex_toy landscape_dwarfing looking_at_viewer machine macro macro_anthro macro_female mammal masturbation monotreme nude on_model on_top robot sega short_tail simple_background solo sonic_the_hedgehog_(series)style_emulation tail tongue tongue_out vaginal vaginal_masturbation vulva white_hair zeta_r-02 zeta_the_echidna