Rule 34 Dev - 2024 2boy 2boys ai_generated anal anal_sex anthro anthro_on_human ass athletic athletic_anthro athletic_male avaru big_penis canid canine freckles from_behind gay gay_sex genitals grey_body grey_fur human_on_anthro humanoid humanoid_genitalia humanoid_penis interspecies large_insertion male male/male male_focus male_only mammal muscular muscular_male nude on_all_fours penis precum tuft vein veiny_penis yaoi|12710808296