A. I am sorry to hear about this problem. It is really unusual in young men, though quite common in older guys, especially those who have had prostate surgery.

Are you sure that your fiancé is really climaxing? I have seen cases where the guy simply could not make it to orgasm and was so embarrassed that he pretended to come.

But if he is having an orgasm, there must be some blockage in his urinary tube. Therefore, it is essential that he consult a urologist, who specialises in genital and urinary problems.

Your email indicates that your man has already seen a doctor. I hope he will refer your boyfriend to a urologist soon. Good luck to you both.

I used to be on the birth-control skin patch. But when I felt my partner was being unfaithful, I discontinued that and went to condoms. This was because I didn't want to contract a sexually transmitted infection.

Since discontinuing use of the patch, I have been having irregular periods. A doctor told me that it was normal, saying it was due to my using birth-control patches for so long. When I went back six months later, he attributed it to stress. But I don't think I am stressed more than anyone else.

I was unhappy with the irregular periods, so I went on the contraceptive injection. Then my menses stopped altogether.

I am not pregnant and not currently sexually active. So what could possibly be the cause of my missing periods? Is 28 too young for menopause?

A. It is very rare for anyone in their 20s to experience menopause, so I feel there must be some other cause for your problems.

It is not surprising that when you were on the contraceptive skin patch, you had regular menses because the patch controls the periods, just like the Pill does.

When you stopped using the patch, your menses became irregular. It really doesn't sound as though it was due to stress. But it could have been due to a hormone problem, which until then had been masked by the hormone-rich patch.

Then you got the contraceptive jab. What you haven't realised is that the injection very frequently makes periods disappear altogether. That's what has happened to you.

However, I suspect that you may still have some underlying hormonal problems. So I think that you should have a blood test to check out your hormone profile.

Though not included in the excerpt above, you told me that you are now living in the US, and are covered by health insurance.

So I feel that you should use that insurance to get that blood test done. I hope it will provide some answers for you. I wish you well.

A. You have the common male condition called premature ejaculation (PE), sometimes known as hair-trigger trouble.

Most guys do get over it eventually, but there are no instant cures. The highest success rates are achieved by couples who together see a therapist who can instruct them in a special exercises, called the Masters-Johnson squeeze technique.

Also, some doctors are willing to prescribe antidepressant medication, which has the side effect of delaying orgasm. But this does not provide a permanent cure. It only works for a few hours.

I suggest you have nothing to do with the famous last-longer pills which are sometimes sold on the street or in bars in Jamaica. They might contain just about anything!

There is a new medication for PE called dapoxetine. But it is difficult to obtain, and only helps some guys.

A. This is quite a contentious subject! And it is a subject of considerable importance because so many couples use the technique of early withdrawal before the man orgasms.

Pre-ejaculate is the 'dewdrop' of fluid which appears at the end of a guy's organ when he has been sexually excited for a little while. It is also called pre-come.

It is not secreted by the testicles, but by glands which are located nearer to the urinary opening. Doctors often advise that it is best to assume that this pre-ejaculate fluid might contain sperm. For that reason, they urge their male patients to wear a condom all the way through intercourse, not just at the last minute.

However, if you check out the Net, you will find that there have been three small research studies which found that this liquid usually contains no sperm - or at least, no sperms which are active.

Nevertheless, some authorities say that the pre-come could get contaminated by sperm produced when the guy last had sex - and which have been lying within the penis since then.

So the jury is still out on this matter. But I would advise couples to assume that the pre-ejaculate fluid might cause pregnancy.

A. There is a little truth in this. Women who have had children are slightly less likely to get breast cancer than those who have never been mothers. But any female can get this very common form of cancer.

A. I am afraid that 25 is approximately the peak age for testicular cancer. So please have this lump checked out by a doc at once!

A. Probably not. Gonorrhoea, or the clap, generally produces no symptoms in females - even though it damages their internal organs. Therefore, it is essential that you get a medical check-up, including swab tests for gonorrhoea.