FURVERT!

anthro balls biceps black_bars black_nose canid canine canis domestic_dog erection eyewear fur genitals german_shepherd glasses green_eyes herding_dog hi_res knot l-i-t-t-l-e_f-i-r-e letterbox male mammal muscular muscular_anthro muscular_male nipples pastoral_dog pecs penis solo white_body white_fur