FURVERT!

anal anal_penetration angelofhapiness anthro balls better_version_at_source blush duo echidna erection eulipotyphlan genitals grass half-closed_eyes hand_holding hedgehog humanoid_genitalia humanoid_penis knuckles_the_echidna lying male male/male male_penetrated male_penetrating male_penetrating_male mammal monochrome monotreme narrowed_eyes nature on_side open_mouth outside penetration penis plant sega sex silver_the_hedgehog simple_background sketch smile sonic_the_hedgehog_(series)tree