rule 34 anthro anus ass backsack balls blue background blush bodily fluids breast grab breast squish breasts butt grab canid canine canis circumjacentity comic cum cumshot dobermann domestic ear piercing ejaculation erection flat colors from behind position gender transformation genital fluids genital transformation genitals hand on breast hand on butt herm hi res humanoid intersex low angle view mammal mtf transformation nails penis penis shrinking piercing pinscher pussy sex simple background simple coloring solo squish transformation transformation sequence 4624582