This is a bit weird but it’s still counted as science as one partner was given a camera to be placed on their genitals just to see how it would look like from the inside while having an intercourse. This experiment would prove how are body reacts during an intercourse. The video was so effective as it clearly demonstrate the scientific details of our human body. This was all planned by the British Documentary group.
On this Experiment they were able to find out that the activity sends sensory information to the human brain whenever they become stimulated and that would result in the releasing of huge amounts of dopamine and oxytocin. This is responsible for what we call pleasure and intimacy.