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6:5 absurd_res anthro anus autofisting autopenetration canid canine erection fisting genitals hair hair_over_eyes hi_res humanoid_genitalia humanoid_penis lying male mammal masturbation monochrome nipples nude obscured_eyes on_front pache_riggs pawpads penetration penis penis_backwards puffy_anus rear_view simple_background sketch smile solo white_hair