Rule 34 Dev - 1boy blood bondage bound bound_arms bound_wrists collar dog_collar dubious_consent gay imzero male male_only male_ryona malesub penis penis_milking_machine pump pumping pumping_cum pumps questionable_consent rope rope_bondage rope_harness ropes scratch_marks scratches scratching sex_swing small_penis tied tied_up twink wounded|13639483976