rule 34 2013 animal genitalia animal penis anthro arm support balls barefoot big penis brown eyes brown penis clothed clothing clothing lift curved penis donkey edit equine equine penis erection grey background holding penis hooves cock hyper hyper penis long penis male male only mammal masturbation mouth hold pants pants down partially clothed pbrown penis shiny shirt shirt in mouth shirt lift side view simple background sink slim solo standing taking it too far thick penis what what has science done why 2134102