rule 34 2023 abstract background anthro anus arm tuft artist name backsack balls birdpaw artist black collar black pawpads black tail blep bondage bondage bound canid canine cheek tuft collar digital media artwork dipstick tail elbow tuft facial tuft fangs full length portrait fur genitals grey tail hands behind back hi res looking at viewer looking back looking back at viewer male mammal markings multicolored body multicolored fur multicolored tail pawpads penis piercing pink anus portrait purple penis purple rope purple tongue rear view restraints rope rope bondage solo tail tail markings teeth tongue tongue out tongue piercing tuft white balls white body white fur white tail yellow ear tip yellow ears 7769535