FURVERT!

abs animal_genitalia animal_penis anthro anus balls bdsm bondage bound canid canine canine_genitalia canine_penis canis chain chained cuff_(restraint)erection fur genitals iron_cuffs karabiner knot looking_at_viewer male mammal metal_cuffs muscular muscular_anthro muscular_male nipples nude penis prison prisoner restraints rock scar sheath solo submissive submissive_male wolf