Rule 34 Dev - animal_genitalia animal_penis anthro balls bdsm black_collar bound canine_genitalia canine_penis collar erection front_view genitals knot looking_at_viewer male nude penis pose rope simple_background solo stripes submissive submissive_male ravenheartbathory rcfox canid canine fox mammal 2015 hi_res signature|2961979090