Although sex provides one of the greatest pleasures known to mankind, few people think about what goes on in the body to produce this pleasurable result. The sexual act is divided into several phases: arousal, plateau, orgasm and relaxation. During the initial phase of excitement, serotonin is released into the blood, which stimulates the feeling of happiness. During this stage, the heart rate also increases, and the blood fills the heitalia. The hormone dopamine is also released into the bloodstream and thus increases the desire for sex. During the next phase, the plateau, the heart rate and breathing continue to increase, and the sensitivity of the genitals continues to increase. The onset of muscle spasms in the legs, face, or arms is not unusual during this phase. Reaching orgasm is the moment of ultimate pleasure. Then the whole body experiences muscle contractions and there is a release of sexual tension. In men, this phase is also accompanied by the discharge of seminal fluid. Women may experience an orgasmic sensation that is extremely pleasurable. NEWS_MORE_BOX When lovers reach the relaxation phase, heart rate and breathing return to normal levels. Organs such as the penis and clitoris also return to their normal state and the whole body relaxes. This is the moment when women like to cuddle into their partner. The reason is that a hormone is released in their brain that increases the desire to connect with the partner. As a result, they feel the need to be hugged.