FURVERT!

anthro anus balls bdsm body_writing bondage bound butt canid canine digital_media_(artwork)english_text erection fox genital_piercing genitals hi_res humanoid_genitalia humanoid_penis looking_at_viewer looking_back looking_back_at_viewer male mammal naomy nude penis piercing public_use scrotum_piercing shaded sketch slave solo submissive submissive_male tally_marks text western_tally_marks writing_on_butt