The corpus spongiosum is a cylindrical mass of erectile tissue found in the male reproductive system. It surrounds the urethra and extends from the base of the penis to the tip, helping to maintain the urethra's patency during erection. This structure plays a crucial role in sexual function by allowing the passage of urine and semen. In addition to its function in males, the corpus spongiosum is also present in females, where it forms part of the clitoral structure. In both sexes, this tissue becomes engorged with blood during sexual arousal, contributing to the overall process of erection and enhancing sexual pleasure.