2018 3d_(artwork) anal anal_penetration animal_genitalia animal_penis anthro anus balls claws digital_media_(artwork) digitigrade dragon erection fangs feline fellatio humanoid_penis knot kreic lion male male/male mammal mane muscular muscular_male nipples nude oral partially_retracted_foreskin penetration penis plantigrade precum precum_string scales sex tail_penetrating tail_sex uncut vein veiny_penis wings