Like, hunger, thrust, sleep, feelings, emotions etc., sex - is also a natural phenomenon, and saying - it is good or bad, doing more or less (which importantly relates to age, circumstances or psychology)has little sense. Sexual performance is inter-related with one's psychlogy & preferences of life. To explain this, peopole who are serious in their studies, conscious about career and are ambitious, would have less attention towards sex in the early stages of their life as compared to people who take these things casually. Physique also plays a vital role when you talk of sex. Physical fitness and good health have bearing on sexual performance and urge for sex. The other important factor related with sex is people's mental frame work and the family background. Amount of sex (more or less) of course has some bearing, if one is healthy and accepts sex as a natural gift of God, it will add to his happiness and to longevity. But at the same time if balance of mind is not maintained, overdose of sex can cause damage also. Nature and time also play an important role in one one's life. By the passage of time and age, sexual urge also keeps on changing.