The bulbospongiosus muscle is a muscle located in the pelvis. It is a paired muscle that is found in both males and females. In males, the bulbospongiosus muscle is part of the superficial muscle group of the penis and is responsible for enabling erections and ejaculation. In females, the bulbospongiosus muscle is part of the superficial muscle group of the vulva and is responsible for enabling sexual arousal and lubrication.

The bulbospongiosus muscle originates from the perineal body and the ischial and inferior pubic rami, and inserts onto the dorsal aspect of the penis or clitoris in males and females, respectively. In males, the bulbospongiosus muscle surrounds the bulb of the penis and the penile urethra. In females, the bulbospongiosus muscle surrounds the vestibular bulbs and the vaginal opening.

One example of how the bulbospongiosus muscle is used is during sexual arousal and intercourse. In males, contraction of the bulbospongiosus muscle helps to maintain an erection and facilitate ejaculation. In females, contraction of the bulbospongiosus muscle helps to increase blood flow to the genitals and facilitate lubrication. This allows for more comfortable and pleasurable sexual activity.