rule 34 2021 abs anthro anti dev armpit hair avian ayden brogulls balls outline beak biceps big nipples bird bit gag body hair bondage boots border bound brogulls brown eyes bulge chest hair clothed clothing erection erection under clothing feathers footwear gag gagged genital outline genitals gradient background gull handcuffs hands behind head harness hi res jockstrap lari larid looking at viewer male muscular muscular anthro muscular male nipples outside border pecs penis penis outline ribs serratus anterior shackles simple background sitting solo solo male spikes tattoo triceps underwear white body white feathers 5097912