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1_eye 4_arms absurd_res adrian_shephard alien alien_genitalia anal anal_penetration animal_genitalia animal_penis anus autofellatio autofellatio_while_penetrated big_penis blackmesajoe_(artist)bodily_fluids cave digital_media_(artwork)duo erection first_person_view genitals green_anus green_penis green_tongue half-life half-life_opposing_force heart_symbol hi_res human interspecies looking_at_viewer male male/male male_penetrated male_penetrating male_penetrating_male male_pov mammal masturbating_while_penetrated masturbation monster multi_arm multi_limb oral oral_masturbation penetrating_pov penetration penile penile_masturbation penis power_bottom prehensile_penis puffy_anus race_x saliva sex sheath shock_trooper teratophilia tongue underground unusual_anatomy unusual_genitalia unusual_penis valve valve_corporation vein veiny_penis xenophilia