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anthro anus backsack balls big_anus butt butt_sniffing canid canine canis crouching duo elephant elephantid enjoying_farts erection facial_tuft fart fart_cloud fart_fetish fart_sniffing farting_on_face fluffy fluffy_tail foreskin fur gas genitals green_fart_cloud green_pupils grey_body grey_skin half-erect hi_res humanoid_genitalia humanoid_penis knot larger_male long_tail male male/male mammal musk obese overweight penis proboscidean proboscis_(anatomy)pupils purple_body purple_fur rear_view sakamata size_difference smelly smile sniffing tail trunk_(anatomy)tuft unavailable_at_source wolf