How do animals differentiate themselves from others? Many studies of self-awareness have used mirrors to assess how visual cues are used.
Odours and sounds are very important in the worlds of many animals.even if an animal doesn’t know “who” she is, this doesn’t mean she can’t feel that something painful is happening to her body. Self-awareness may not be a reliable test for an objective assessment of well-being.
There is strong evidence that gender and gender roles are influenced by structural differences in the brain between men and women.
It has been proven in numerous brain studies that men and women have different brain structures and transgender individuals tend to match the structure of their self-identified, not birth, gender.
It is a reproduction strategy for some animals. Oddly, humans are not the only animals that engage in cross-dressing or have transgender identity issues
Darwin’s theory of evolution by natural selection implies that genes have to get themselves passed on to the next generation, or they will die out.
Only two species have been observed showing a same-sex preference for life, even when partners of the opposite sex are available. One is, of course, humans. The other is domestic sheep.
For example, in flocks of sheep, up to 8% of the males prefer other males even when fertile females are around.st. A part of their brain called the hypothalamus, which is known to control the release of sex hormones, was smaller in the homosexual males than in the heterosexual males.
The short answer is that it probably doesn’t benefit the homosexual males themselves, but it might benefit their relatives, who may well carry the same genes and could pass them on. For that to happen, the genes that make some males homosexual would have to have another, useful effect in other sheep.
We may never find a wild animal that is strictly homosexual in the way some humans are. But we can expect to find many more animals that don’t conform to traditional categories of sexual orientation. They are using sex to satisfy all sorts of needs, from simple pleasure to social advancement, and that means being flexible.