The study concluded that the thrust of the penis during love making helps to clear a woman’s reproductive system of a previous lover’s semen. The results were concluded after experiments using latex phalluses, an artificial vagina and a mixture of starch and water.

Researchers found the coronal ridge of the penis, found where the glans, or head, meets the shaft, could scoop out more than ninety percent of the cornstarch mixture with just a single thrust.

When the same experiment was done with a phallus with out the coronal ridge only “scooped up” around thirty five percent of the cornstarch mixture.

The same research team found that depth of thrust was also very important. A thrust of only three quarters was found to shift only around forty percent of the synthetic semen substitute.

The test were expanded further to study students and found that love making tended to be more energetic if the male believed the women had been cheating or the couple had been apart for a long period. This led researched to conject that me have a sub conscious desire to their partner of any evidence of another man’s semen.

The State of New York University lead researcher spoke on the subject saying “We theorize that as a consequence of competition for paternity, human males evolved uniquely configured penises that function to displace semen from the female vagina left by other males”.

“Thus, the human penis may enable males to substitute their semen for the semen of their competitors.”

“Not only did we obtain data derived from artificial genital models that were consistent with this hypothesis, but we also found that under conditions that raise the threat of female infidelity, college students reported changes in sexual behavior that would serve to purge the vagina of foreign semen prior to ejaculation.”

In the intrest of debate there are others that dispute this theory. Mr Derek Machin, a urologist at University Hospital, Aintree, said the theory seemed “far fetched”.

“The research might very well be accurate, but I’m not convinced that just because the penis does something like this it was necessarily designed to have that effect.”

Dr Colm O’Mahony, chairman of the UK Association for Genito-Urinary Medicine, said the theory seemed flawed.

“If the man continues to thrust after ejaculation he would simply be scooping out his own semen.”

“Also does the sexual position matter – I imagine gravity has some role here. Maybe those missionaries knew something about position after all?”

The research is published in the journal Evolution and Human Behaviour.

The Size genetics-Extender comes with a specially-designed ring made of plastic material that is placed around your penis and a plastic and silicone holder that is fastened around the penis head. Between the ring and the holder, two dynamic metal bars are attached applying an adjustable tension between 1.5 and 3.5 lbs.

So how does the Size Genetics-Extender actually work?

Let’s start by looking at the anatomy of the penis. The penis comprises of three structures: two large chambers on the top of the penis (the Corpus Cavernosum) and one smaller chamber on the bottom (the Corpus Spongiosum). These three chambers contain spaces between networks of tissue. So when the penis is in a resting state (or flaccid), the spaces are reduced and the tissue is condensed. However during erection, the blood flows into the chambers causing the penis to be enlarged, hardened and elevated.

The amount of blood these chambers can hold determines the size of the penis. Penis enlargement can then be achieved by expanding the actual blood-holding capacity of the chambers. These chambers, in turn, can be increased and developed that may result in gains in penile length and girth.

The Size Genetics-Extender uses traction to assist the human body’s natural ability to change and develop under physical influence. By exposing to a constant, permanent stretch, the cells in the chambers begin to divide and multiply, thus increasing the tissue mass. This process allows the penis to hold more blood than it could before. As a result, enlargement can be noticed in both length and width (girth) of the penis.

The Size genetics-Extender can be used any time of the day for various time intervals, as you please. It is not necessary to ear the Size genetics-Extender for a long uninterrupted time to obtain results. You can also take a break for a period of time without diminishing the final result. Refraining from using the Extender does not result in “losing” part of the enlargement already gained.

The result depends on the total amount of hours the Extender is worn, combined with the amount of traction. It may also be worn at night but may become detached from moving around. It is recommended to use the Protection Pad or other form of protective measure when the Size genetics-Extender is worn at night.

The enlargement will continue as the treatment continues, however, there will be a point that your body reaches its fullest potential and will no longer have increases.

The practice of hanging weights from the penis has been suggested as the method of penis enlargement by the pharaohs of ancient Egypt. The practice is likewise evident in certain African tribes such as the Karamojong of the northeastern Uganda. At puberty, a Karamojong boy was said to hang stone disks from the tip of his penis. More and more disks are added until it reaches to about 20 pounds by the time he is a teenager. By then, his penis could measure up to 18 inches or longer.

The Size Genetics-Extender, a specially-developed traction device, is based on the same principle, although modernized and relatively safer. The Size Genetics-Extender comes with a specially-designed ring made of plastic material that is assured to fit ergonomically every penis size and a plastic and silicone holder that is fastened around the penis head. Between the ring and the holder, two dynamic metal bars are attached applying an adjustable tension between 1.5 and 3.5 lbs. The Size Genetics-Extender can be used any time of the day for various time intervals, as you please.

As compared with other methods of penile enlargement, the Size Genetics-Extender offers a solid, durable, and high quality workmanship that is easily the competitive option for a long-term, high-yield investment.