Rule 34 Dev - abs anthro athletic bdsm beak biceps bodily_fluids bondage bound clothing cuff_(restraint) deltoids growth laboratory male muscle_growth muscular muscular_anthro muscular_male navel neck_muscles pain panties pecs restraints ripped_muscles solo sweat sweating_profusely test_subject triceps underwear veiny_muscles birdovo avian bird falcon falconid hi_res|58478968