The Big ImageBoard (TBIB) - ambiguous gender animal genitalia beak big butt blue body bone frill brown body butt cloaca dinosaur erection feral frill (anatomy) genitals graphite (artwork) hi res horizontal cloaca horn humor imminent sex laugh looking back male mixed media nervous nervous expression nude open mouth ornithischian penis pink penis presenting presenting cloaca rear view reptile scales scalie shocked expression simple background sitting on another size difference smaller male spiked tail spikes spikes (anatomy) stegosaurian stegosaurus tail text thagomizer thyreophoran traditional media (artwork) yellow body zuniceratops zw3