Rule 34 Dev - abs after_transformation anthro athletic beak biceps bodily_fluids bound breath clothing cuff_(restraint) deltoids feathers growth laboratory male muscle_growth muscular muscular_anthro muscular_male pain panties panting pecs restraints science serratus solo sweat test_subject trapezius triceps underwear birdovo falcon_steve_(birdovo) avian bird falcon falconid absurd_res hi_res|63119344