Extensive clinical research and studies have suggested that optimal maintenance of healthy sex life is dependent on some basic principles. Most individuals who develop sexual dysfunction can manage their symptoms without going through extensive therapeutic or pharmacological regimens.
Having said that, are you aware that drinking can significantly influence you sex drive? We are dealing with the universal drink i.e. clean refreshing water. 
How Can Water Intake Influence Your Sex Drive?
We all know that water is perhaps the most vital and integral constituent of the human cells. All major biological activities and functions utilize water molecules, which should be replaced by optimal oral intake. Poor tissue hydration can compromise the vitality of the cells and may lead to a number of diseases.
Healthcare providers suggest that poor intake of water can affect sex drive in a number of ways;
Poor tissue hydration directly affects the pace of energy generating processes, which deprives you of physical stamina required for sexual stimulation and act of intercourse.
If you water intake is low, the impurities, pollutants and toxins may build up in your tissues and compromise your biochemical balance, ultimately affecting your endocrine hormones and libido.Tissue dehydration can lead to vaginal dryness, headaches, poor circulation and low circulatory pressure to the tissues. Needless to say that all these factors can interfere with libido and sex drive.
A lot of people strives to intentionally hydrate their bodies before planning a workout session or a run. However, very few people take hydration into consideration before planning a romantic night with their partner. According to a latest study, 25 to 30 minutes of sexual activity is comparable to a 3-mile run. This also means that the rate of emotional and physical fatigue is equivalent to a good workout. Psychologists suggests that the post-coital energy decline also restricts couples from engaging in frequent sexual encounters, directly compromising the quality of relationships.
How Can You Improve Your Libido With Higher Water Intake?
Here are a few tips that may help in improving your sex drive by merely increasing your daily water intake: 
Small decisions such as minor adjustments in your dietary or lifestyle choices, can greatly affect the quality of your sex life. However, if your impaired sex drive is due to an organic or physical illness, it is highly recommended to seek the help of a registered healthcare professional to address the issues as early as possible.
References:
Chung, E., De Young, L., & Brock, G. B. (2011). Investigative Models in Erectile Dysfunction: A State‐of‐the‐Art Review of Current Animal Models. The journal of sexual medicine, 8(12), 3291-3305.