Rule 34 Dev - abs animal_genitalia animal_penis anthro balls biceps canine_genitalia canine_penis digitigrade erection fur genitals knot knotted_penis male muscular muscular_anthro muscular_male nude penis sheath solo tail text transformation unsheathed yellow_eyes rex_equinox canid canine canis domestic_dog german_shepherd herding_dog human mammal pastoral_dog 2012 comic english_text hi_res|1318275875