The pubococcygeal muscle group located at the pelvic floor and running from the pubic bone to the tailbone in a figure eight around the genitals. The health, strength, and endurance of these muscles are important in both male and female sexual response. In the male they help produce strong erections and orgasmic control. In the female they are useful for increasing pleasure and helping the orgasmic response. Exercising them consists of tightening or squeezing them.