anthro anus backsack balls black_body black_fur butt claws crouching forest forest_background full_moon fur genitals grass horn landscape light male mane moon moonlight mountains muscular muscular_anthro muscular_male nature nature_background night night_sky outdoor_nudity outside plant presenting presenting_anus presenting_balls presenting_hindquarters raised_tail rear_view sky solo spread_legs spreading star starry_sky tail_up tree yiffymix_(model) bezi_(director) charr felid mammal