A 2006 study found that the increase of prolactin is 400% greater for both men and women following orgasm achieved through intercourse, when compared with solitary masturbation.
Why is this significant? The increase of prolactin after orgasm contributes to a reduction of sexual arousal, along with feelings of relief and a greater drop in sexual tension. The researchers suggested that factors such as more excitement during intercourse might contribute to the greater amounts of prolactin after orgasm. While prolactin isn’t the only factor in sexual satisfaction, the implications are important. Read more