rule 34 animal genitalia animal penis anthro arm tuft ball tuft balls black claws black pawpads blue hair border brown eyes canid canine genitalia canine penis cheek tuft chest tuft claws elbow tuft erection facial tuft fangs fur genitals gloves marking grey balls grey body grey fur grey inner ear fluff hair hi res holding object holding sex toy inner ear fluff knot leg markings lying male mammal markings masturbation narrowed eyes no pupils nude on back open mouth open smile pawpads penetrable sex toy penile penile masturbation penis red penis sex toy shoulder tuft simple background smile socks marking solo spread legs spreading teeth tuft unsigned white border yookie 7316659