Researchers at New York University School of Medicine gave L-arginine to a group of impotent men, and found that six out of 15 men receiving the amino acid claimed an improved ability to achieve erections, while none of the 15 men in the placebo group reported any benefit. Choline and Vitamin B-5 Sexual arousal occurs not just in the genitals but in the whole body and, especially, in the brain. For men, it actually begins when the brain sends impulses down the spinal cord and out to the nerves that serve the penis. ACh also seems to control sexual behavior through its activity in the brain. For women, ACh is also a very important part of sexual function.
Numerous studies confirm a key role for cholinergic nerve transmission in sexual responses.
Simply speaking, with too little ACh, sexual activity goes down. Increase ACh levels, and sexual activity goes up. ACh is involved in the build-up toward orgasm and the urethral and vaginal contractions that occur during orgasm as well as the subjective perception of orgasm intensity and duration. In addition to its direct role in the sexual response, ACh is also the primary chemical the body uses to transmit signals from nerves to skeletal muscles, the muscles that move the body. You need this chemical for muscular control and proper muscle tone.