Rats are fascinating creatures known for their high reproductive behavior, engaging in sexual activities multiple times throughout the day. They can have sex up to twenty times daily, highlighting their strong instincts and social behaviors. This prolific nature is not limited to seeking out female partners, as male rats may also turn to other males for sexual satisfaction if no females are available.

This information is presented in Bill Bryson's book, "At Home: A Short History of Private Life," which explores various aspects of human and animal behaviors within domestic settings. Bryson's examination of rats provides insights into their lifestyles, illustrating how their needs and desires often dominate their daily routines.