Our brain is a kind of machine that receives stimuli and creates pathways or inculcate grooves. Our brain is equipped with billions of neurons that create endless pathways, some shallow, some deep grooved. Some pathways serve us in our most intimate situations.
As long as the stimulus is perpetuated, the nervous cells of any particular pathway are forced to communicate between them more frequently, thus strengthening the connections. With continuous repetitions, these behaviors become automatic. Examples of complicated behaviors that we do automatically because neural pathways have formed are eating, writing, and driving a car.
The neural pathways get stronger with repetition until the new behavior becomes normal. Old Latin proverb says “REPETITA IUVANT” meaning repetition is beneficial.
The external stimuli are perceived by millions of receptors placed on our body. Via those receptors, we interact with the surrounding environment. One of those interactions is during our intimacy where we interact with macro-environmental stimuli and microenvironment stimuli, i.e. vaginal temperature, humidity, and contact.