FURVERT!

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