Rule 34 Dev - alpha_channel anal anal_sex balls bondage bound canine clothing collar deep_throat deepthroat deepthroat_training doberdog dogboy erection fangs fingerless_gloves flat_colors gloves goo good_boy halter human human_only humanoid_penis ink legwear lingerie male mammal mask muttpup oral oral_sex paper_bag penetration penis petboy petplay restrained roleplay simple_background slime softailbobber solo spread_legs spreading submissive tar tentacle throat_training tongue tongue_out toony transparent_background|2856168664