There is no genitalia visible on the ones that appear to be male, nor is there a pubic bulge seen through the clothing.
These reports seem to point to the same conclusion:
The Greys are sterile mules, with no sexual organs.
Descriptions of Grey bodies illustrate their sameness:
very similar bodies, with only slight changes in proportions, and stylistic differences being observed in their heads.
However, even without sexual organs, the Greys seem to have gender and are not simply neuter. The genders, however, appear to be completely determined by the mind, with the bodies being identical almost identical. Abductees report that some Greys ‘feel‘ or ‘seem‘ feminine, while others are very masculine.
This seems to point to a time of sex differentiation, which was bred out physically, leaving only the mental pattern to demonstrate the differences between males nd females in the Grey social infrastructure. It should also be noted that female Greys are very rarely seen, and are reported to be sterile and incapable of giving birth to offspring. The males are the ones most commonly observed, and simple deduction will show that there is one scenario possible: the Grey females are few in number, and must be isolated for some reason, perhaps to prevent their loss or for genetic repositories. Nevertheless, because Greys cannot breed naturally, due to a lack of sexual organs, artificial methods must be incorporated into their society on a massive, if not simply large, scale to prevent their demise as a species.
Origins from Cetaceans: Based on the evidence of their physical appearance, the following hypothesis can be made: The Greys are descended from a dolphin-like or cetacean-based life form. There are several reasons for this supposition. The answer can be found in the similarities between cetaceans and Greys, using physical and behavioral aspects.
Physical Aspects and Similarities: First, let us examine the physical characteristics. The skin of a Grey is very similar to that of dolphins in texture, and in most cases, coloration. On Terra, cetaceans evolved legs and arms to function on land, but when they returned to the oceans, the arms and legs evolved into flippers and tails. X-ray analysis clearly shows the residual appendages in modern-day dolphins and whales as being comparable in skeletal structure to that of land-dwelling mammals in placement and types of bones. It is possible that the Greys evolved much like Terran dolphins did, but did not return to the oceans, but continued to develop as a land-based mammal.
Next is the skull shape: The Greys have a large rounded skull region area on the upper anterior and posterior sections of their skulls. An examination of the dolphin skull shows very similar large, rounded anterior and posterior areas.
The eyes of Greys are described as large and black, with what appears to be a protective shielding covering the eye. Many Terran aquatic animals have developed protective outer eye shields for underwater use. It is possible that this is a left-over attribute from the Greys’ ocean origins which has not been bred out, perhaps due to several unknown advantages of the shield. Another factor is the dark coloration of this eye shield. It suggests an eye structure suited for a reduced light environment. In the oceans, this would be natural for a creature living underwater where the planet’s primary light source does not penetrate very deep. The dark coloration would in indicative of eyes that absorb nearly all the light that enters it, creating the appearance of blackness. On Terra, dolphins and other cetaceans developed sonar ability as their primary navigational aid, and thus do not rely as much on sight while underwater.
Behavioral Aspects and Similarities There are also several similarities in the behavior of Greys and dolphins. Terran dolphins use sonar both to navigate and stun prey and enemies. The stun affect is of particular interest in this case. Dolphins can emit very powerful and focused ultrasonic bursts from the anterior section of their skulls, from an organ knows as a ‘melon‘.
This is used to stun prey and enemies, such as sharks and barracuda. There has been an excellent film created by a group of students while diving, illustrating of a group of dolphins utilizing this ability on a very large barracuda. The barracuda was swimming towards a group of very young dolphins.
Four large adult dolphins turned so that there heads were directly aligned with the barracuda, and emitted a sustained ultrasonic burst. The effect on the barracuda was astounding. It literally froze, completely paralyzed in the water, and even the gills ceased to move. The dolphins stared at it for about thirty seconds, during which time the barracuda remained totally immobilized. As soon as they turned their heads away, the ultrasonic beam was no longer focused on the barracuda, whereas it fled at a very high rate of speed from the scene.
Obviously, this beam was tightly focused, and required the dolphin’s head to be pointed directly at the target.
The strength of the beam could be changed as well. When hunting, the ultrasound beam could be directed at small fish and amplified to lethal levels, causing instant death. Some cetacean researchers believe that this is also used when dolphins ram sharks. Autopsies of the shark corpses after a dolphin attack reveal the sharks internal organs have been visibly shattered. The beam can also be controlled so as to produce a stun type effect, as in the case of the barracuda. The result was physical paralysis and disorientation. This phenomenon is very similar to the technique used by the Greys as an aid to telepathic control of abductees.