rule 34 absurd res anthro balls blush bodily fluids bondage bondage bound canid canine canis cuff restraint daffyd detailed background digital media artwork dobermann domestic erection fur genital fluids genitals grass hair handcuffed handcuffs hands behind back hi res leaking precum looking at viewer male mammal metal cuffs muscular nipples nude outside penis pinscher plant precum restrained restraints sky solo ventkazemaru 7356779