What causes premature ejaculation?
Premature ejaculation is the name given when a man ejaculates either before, or a very short time after, entering the vagina.
It's a major concern for many blokes, with 30 per cent of lads reporting to have been affected by the condition last year.
According to the NHS, a number of psychological and physical factors can cause premature ejaculation.
Physical reasons include prostate problems, thyroid problems and recreational drugs.
Experts have revealed that men with bigger bellies last longer in bedCredit: Alamy
Meanwhile psychological problems include depression, stress, relationship problems or anxiety about sexual performance.
A study has shown that the size of a man's stomach may well be a better indicator of how long he can keep it going in the sack.
The researchers studied 200 men; comparing their body mass index (BMI) to their sexual performance.
Interestingly, the result showed that fatter men with bigger bellies lasted longer in bed then their svelte counterparts.
In fact, men with visible belly fat and a higher BMI could get down to it for an average 7.3 minutes, while slimmer men lasted an average of 1.8 minutes in the sack and were more likely to suffer from premature ejaculation.
The scientists thought that the reason behind larger lads lasting longer is that they have higher levels of the female sex hormone oestradiol, which may disrupt the body's chemical balance and inhibits them from climaxing for longer.
How can you treat premature ejaculation?
There are a number of things you can do before seeking professional help.
According to the NHS, it can sometimes help to:
masturbate an hour or two before having sex
use a thick condom to help decrease sensation
take a deep breath to briefly shut down the ejaculatory reflex (an automatic reflex of the body during which ejaculation occurs)
have sex with your partner on top (to allow them to pull away when you are close to ejaculating)
take breaks during sex and think about something boring
If you do require treatment, this can be in the form of behavioural techniques, topical anaesthetics, counselling or medication.
A doctor may order blood tests to check the levels of testosterone, and you may be referred to a urologist or sexual dysfunction specialist.