In this case, by lowering blood pressure. The hypothalamus dictates the release of a hormone called oxytocin. It is a number that alludes to something a vast majority of us already know — people love having sex. Advertisement 6 of 9 Getty Images Sex can wipe your memory clean Each year, fewer than 7 people per , experience "global transient amnesia," a sudden but temporary loss of memory that can't be attributed to any other neurological condition. After an orgasm, the body also releases higher levels of a hormone called prolactin , which is known to play a key role in sleep. While it's possible that regret or feeling coerced might be the reason why, researchers can't explain the connection at this point for sure. The researchers hypothesized that various compounds in semen, including estrogen and prostaglandin, have antidepressant properties, which are then absorbed into the body after sex. The researchers suspect the biological reason for this link between sexual activity and specific areas of cognition is related to dopamine , the neurotransmitter that regulates pleasurable emotions and pushes us to seek out activities that make us feel good. Here's what we know so far about your brain on sex. The researchers hypothesized that various compounds in semen, including estrogen and prostaglandin, have antidepressant properties, which are then absorbed into the body after sex. According to researchers, there is such a thing as post-sex blues technical term: That's why we want it, like it, and spend so much time hunting for mates. This usually bodes well for our mood, but there are some exceptions. But scientists are starting to unravel the mystery. This is good news for anyone who is in a committed relationship, but if you're still playing the field, then you shouldn't give up condoms. During an episode, a person cannot form new memories or remember very recent events.