It was not until I was 26 that I first went out with a girl. We did not kiss or have sex that night, and she did not want to go out with me again. Two years later, I met my wife. We did not have sexual intercourse until several weeks after the wedding, so (as you can see, doc) I was a virgin. She was not.

That was three years ago, and since then we have established quite a good sex life. I have to admit that I enjoy it. But what is making me fret is her behaviour during sexual union. And I would like to know if there is anything wrong with that behaviour.

To be frank, doc, she is a little like an animal during lovemaking. Soon after we start, she begins to breathe real fast, and her eyes start rolling. After a while, she begins to grunt every time I thrust inside her.

It is quite embarrassing to tell you this, doc, but as she gets nearer and nearer to her discharge, she starts to squeal. And at the moment of her orgasmic climax, she screams like a soul in torment. Because the noise is so loud, I sometimes think that people in nearby houses will be wondering if I have killed her.

So what I need to know, doc, is whether other women are like this? If so, that is OK. But if not, then has she got some kind of sickness?

A: Well, some readers will be amazed at the lack of knowledge in your letter. But we have to remember that you were brought up very strictly, with no real understanding of women and their sexuality. Also, you did not go to bed with a lady until around the age of 28 or 29, if my calculations are correct. So you are real innocent where sex is concerned.

Anyway, you are fretting about your wife's reaction to the kind of sex you are giving her. Well, I have to tell you that you must be doing pretty well between the sheets because her reaction is what I would describe as 'more than satisfactory'.

Why? Because what you describe are the noises which a real passionate woman makes when she is being 'well satisfied'.

Basically, what highly-sexed ladies do during sex is this:

Now what I have just described is exactly what your wife is doing. So my conclusion is that you are stimulating her real well - and that she is a real passionate lady. Congratulations.

These days, she and I like watching these films together because it turns us both on. But one thing is bothering me, doc. In most of these videos, the guy and the girl start by having sex in the 'regular' way. Often they have some 'oral' as well. Then he turns her over, and they have rectal sex.

It is clear from those movies that the woman really enjoys the rectal intercourse, and loves being penetrated in that way. But what surprises me, doc, is this.

My girlfriend does not want to let me have that kind of sex with her. She says it would hurt her, and that she just does not wish to do it. She claims it could harm her body.

I have tried to reason with her, and to explain to her that it is just another way of having exciting sex together. But she will not listen to me, and just keeps saying, 'No way!' Who is right, doc?

A: She is. Unfortunately, these days, a lot of guys have watched porn videos or DVDs - and have got the idea that 'all girls do rectal sex'. This is just not true.

Surveys in various countries have suggested that around 20 per cent of couples have tried rectal (anal) sex at some time. This means that about 80 per cent have not.

In general, women are much less keen on it than men. This is mainly because of the simple fact that when they first try 'bottom sex,' it nearly always hurts them a lot.

You can see why it hurts by simply looking at the size of your male organ, and the size of your girlfriend's 'rear opening'. One is large - and the other is small.

So in the blue movies, how do the female 'stars' manage it? Simply through years of practice. These actresses know that they will be paid extra for doing rectal sex, so over a period of many months they gradually learn to take bigger and bigger objects into the bottom. Eventually, this leaves the anus (which is the opening of the bowel) rather loose and 'saggy.'

One result of this is that a woman who does regular rectal sex may well become slightly incontinent of bowel motions - so that she soils her underwear. Other disadvantages of rectal intercourse are that it may cause bleeding and infection. Finally, it is a real effective way of passing on HIV.

So all in all, I think it is not surprising that your girlfriend is not too keen on it.

A: No. Gout is a disorder in which there is too much of a chemical called 'uric acid' in the body. It is not caused from VD. Usually, it gives you bad pain in the foot. During attacks, your doc can give you 'anti-inflammatory' pills to ease things. And between attacks, you may need another kind of tablet, to lower the level of uric acid.

A: It is a gland, about the size of a small ackee. It makes part of a guy's sex fluid. Unfortunately, in the over 50s it often swells up - causing difficulties with passing urine.

A: No way. When making love from behind, the man's penis is nowhere near the clitoris. The only way the guy can stimulate it is by 'reaching round' with his hand. In fact, this usually works really well in helping the lady to discharge.

A: I often receive this question from young teenage girls. It is simply caused from the fact that the months of the calendar are of varying lengths. If you have a regular 28 days 'cycle' the menses are bound to occur on a different day each month - like, for example, 5th January and (28 days later) 2nd February.