FURVERT!

abs anthro balls body_hair canid canine canis claws cocogo erection fangs fur genitals glans grey_body grey_fur hand_on_own_penis hand_on_penis happy_trail hi_res looking_at_viewer lying male mammal masturbation muscular muscular_anthro muscular_male nipples on_back pecs penile penile_masturbation penis simple_background solo spread_legs spreading tail teeth vein veiny_arms veiny_feet veiny_penis white_background wolf