There may be many reasons why sex time becomes shorter. Here are some common factors:
1. Psychological factors
Anxiety and stress: Work, life or emotional stress may lead to anxiety, which may affect sex time.
Sexual tension: Concerns about performance or nervousness about sex may lead to premature ejaculation.
2. Physiological factors
Physical fatigue: Physical fatigue or lack of sleep may lead to shorter sex time.
Hormonal changes: Changes in hormone levels, especially decreased testosterone levels, may affect sexual endurance.
3. Sexual skills and experience
Insufficient skills: Lack of experience or insufficient mastery of sexual skills may lead to shorter sex time.
Overstimulation: Sensitivity to certain stimuli may lead to orgasm too quickly.