rule 34 1boy 2015 anthro anus ass backsack balls bottomless buckteeth circumcised clothed clothing cobalthusky digitigrade dripping elder male foot wraps half dressed humanoid penis inviting looking at viewer looking back male male only mammal master splinter penis perineum precum presenting presenting hindquarters raised tail rat robe rodent sheath signature solo staff teenage mutant ninja turtles teeth tongue tongue out 1909476