Those could be stress, sadness
Receptors in muscles provide the brain with information about body position and movement which has a connection between your muscular and Nervous system.
Answer:
In the male anatomy, the autonomic nervous system, also known as the fight or flight response, produces testosterone and activates the sympathetic nervous system which creates arousal. Stress causes the body to release the hormone cortisol, which is produced by the adrenal glands.
Explanation:
