What natural ways can I improve my libido and sex drive

Hi, i am turning 24 this year and since my teenage years i have noticed that my sex drive is lowering and so is my libido! I don't get as hard as i use to and i don't get as many errections as i use too! When i first was going out with my girlfriend i use to always get an errection, once even because she held my hand... now i believe because i have gotten use to all this, sexual stuff too... my drive and libido has gone down... i also masterbate like all males do... should i reduce masterbation and what natural stuff can i take to increase my libido and errections?

The urge of adult humans to have sexual intercourse is seen as being part of the biological need for social bonds. It is categorized with the needs for family, friends, and group acceptance in Maslow's hierarchy of needs. Moreoever, it is a basic instinct for survival, by way of reproduction and extend bloodline. The very need for sexual intercourse may have more to do with reproduction then creating social bonds. At an emotional level sexual intercourse is often, though not always, seen as the ultimate physical expression of feelings of romantic love between two humans. In many cultures, mutual romantic love often forms a formalized or informal partnership, a full sexual relationship within this partnership, procreation or adoption of children, and subsequent parenting. On a biological level, an increasing amount of research is demonstrating that a man's sex drive (and sexual attractiveness to women) is closely linked with hormones such as testosterone. A man can boost his testosterone naturally through reducing (or eliminating) smoking, alcohol, certain drugs such as most anti-depressants, emotional stress, and simple carbohydrates such as white sugar. He should also avoid exposing his testicles to too much heat such as from a hot tub. Conversely, eating a diet of 70% fruits and vegetables and 25% to 30% protein boosts a man's testosterone, as does drinking more water, lifting weights, sunbathing, and meditation.Sexual intercourse is also often decoupled from romantic love and/or from a wish for procreation. Casual sex, often used to satisfy a physiological or psychological need, is common although it is censured by some as being promiscuous and morally questionable. The sex industry is the commercialization of sex, and includes the production of pornography, erotic art, and erotic literature, as well as prostitution.