Sexually transmitted diseases (STDs) are infections that are passed from one person to another through sexual contact. The causes of STDs are bacteria, parasites, yeast, and viruses. There are more than 20 types of STDs, including. Chlamydia. Genital herpes. Gonorrhea.
Society for Endocrinology. Hormones. Oxytocin is a hormone that acts on organs in the body (including the breast and uterus) and as a chemical messenger in the brain controlling key aspects of the reproductive system including childbirth and lactation, and aspects of human behaviour.
The release of oxytocin is stimulated by the digestion of fat. When your small intestine digests fat, it releases a chemical called CCK. CCK signals the brain to release oxytocin, which causes the smooth muscles of your gut to contract. This helps create the feeling of satiety after eating.