FURVERT!

abs anthro anus arctic_fox athletic athletic_anthro athletic_male balls bioluminescence biped blue_penis butt canid canine erection fox fur genitals glowing glowing_eyes glowing_genitalia glowing_penis grey_body grey_fur grey_hair hair hand_on_butt hot_spring inviting kaynine legs_up lying male mammal nude on_back on_ground onsen outdoor_nudity outside penis perineum presenting presenting_anus presenting_hindquarters short_hair shy solo spread_butt spreading true_fox water