Many sculptors, right up to Michaelangelo and beyond, had a great respect for the human figure, taking great pains to render musculature as realistically as possible. Yet the Greeks sculpted the penis in such tiny proportion, particularly compared to the size of the sculpted testicles. Michaelangelo's painting of Adam on the Sistene Chapel ceiling, shows a particularly tiny penis; which I find perplexingly odd, considering that Michaelangelo had a keen respect for the male figure, equating it to a symbol of divine power. Some say the tiny proportions are related to respect for the divine, a wish to alleviate vulgarity.