rule 34 2023 5 fingers anatomically correct anatomically correct genitalia anatomically correct penis animal genitalia animal penis anthro balls barefoot big balls biped black nose border collie canid canine canine genitalia canine penis canis cashmere cashmerix claws collie crouching digital media artwork digitigrade domestic erection feet fingers floppy ears fur genitals grey body grey fur herding hi res knot knot root looking at viewer male mammal markings multicolored body multicolored fur multicolored tail neck tuft nipples nude pastoral penis pink penis presenting presenting penis purple eyes sheep simple background smile solo spots spotted body spotted fur tail tail markings toes tuft valleygirl white balls white body white fur 7708292