Rule 34 Dev - abs anthro athletic bdsm beak biceps bodily_fluids bondage bound cuff_(restraint) deltoids feathers flexing flexing_biceps growth laboratory male muscle_growth muscular muscular_anthro muscular_male navel pain pecs restraints ripped_muscles screaming solo sweat sweating_profusely test_subject triceps veiny_muscles birdovo accipitrid accipitriform avian bird eagle hi_res|58476744