Rule 34 Dev - 2017 abs absurd_res anthro balls biceps bondage bondage_gear bound digital_media_(artwork) erection grey_penis harness hi_res horn humanoid_penis looking_at_viewer male male_only mammal muscular muscular_male nipples nude partially_retracted_foreskin pecs penis pose pubes rakisha rhinoceros ryan_carthage simple_background solo standing tattoo uncut vein veiny_penis|2776183616