Feeling lack of energy after intercourse and early ejaculation all the times and feeling sleepy immediately, no tendency at all to make efforts for second round of sexual act due to feeling of lethargy and immense loss of sexual power. Otherwise, no weakness of any kind due to any medical problem, quite healthy and active. Having tendency to delay the things in daily routine and not able to lead a disciplined routine although, also not stressing for matters which are quite crucial for other family members. Why is this so. Do these habits have any link with performance in sexual act or vice versa. What is this ailment or it is just a normal thing to have very less stamina and endurance.