1. Stress
Stress is a state of mental tension, which occurs when people are constantly worried as a result of, problems in their personal and professional life 

When men constantly find themselves in highly stressful situations, where they do  not have any healthy outlet to pour their stress out, the stress can cause them to start having premature release during intimacy

2. Anxiety
Anxiety is a situation when people feel very nervous and restless about things that might happen. Some men have anxiety problems which causes them to be nervous at all time. 
One of the things that causes anxiety in men during intimacy is thought of, whether or not, they will perform well in bed. Anxiety can make men release prematurely during intimacy.

3. Lack of confidence
Men who have confident issues due to certain problems can have issues with premature release. When a man lack's confident in his body  or, his ability to perform, his lack of confidence can make him to release too fast during intimacy.

This problem can be solved immediately the man in question  develops confidence and begin to appreciate his body image.

4.Between 30% and 40% of men experience premature ejaculation at some point in their life. According to the American Urological Association, premature ejaculation is the most common type of sexual dysfunction in men. About one in five men between the ages of 18 and 59 report incidences of premature ejaculation.

5. Physical, chemical and emotional/psychological factors cause premature ejaculation.

Physical and chemical problems include:

An underlying erectile dysfunction diagnosis.
A hormonal problem with oxytocin levels, which has a role in sexual function in men. Other hormone levels that play a role in sexual function include luteinizing hormone (LH), prolactin and thyroid stimulating hormone (TSH)

Low serotonin or dopamine levels, chemicals in the brain that are involved in sexual desire and excitement.
A penis that is extra sensitive to stimulation.