Priscilla Long observes worms:
Worms like sex. They are hermaphroditic, each one possessing both male and female genitalia. But they do not fertilize themselves. They copulate, each inseminating the other. During sex, worms can cling together for as long as three hours. In his vivid book on earthworms, The Formation of Vegetable Mould Through the Action of Worms with Observations of their Habits, Charles Darwin writes: “Their sexual passion is strong enough to overcome for a time their dread of light.”
The Dish 