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7

There are (at least) two ways epigenetic traits are inherited. The important background in both cases is gene expression: there is a misconception that genes are for this or that, where the reality is that most traits come from an overlap of several genes expressing themselves in different ratios. As a simple example, consider two varieties of bird of the ...


5

In my mind there are two main explanations of this kind of instinct behaviours. The first one is rooted in evolution. There are many examples of human innate behaviours which we can't explain e.g. when we see a lace or tape on the street we automatically jump and feel scared. Although we live in big city our brain associates the lace with a snake. It is ...


5

Iguanas are not carnivores. Look at it historically: we have had useful animals around us for thousands of years: dogs to help hunting, cats to keep vermin away. Other non-carnivorous pets was at some point - and still are - domesticated for food (rabbits, guinea pigs). Pigs are a gray area: they will pretty much eat anything, meat included. Then you ...


5

The first question is, what is normal human sexual behavior. The answer to this changes over time. For example, a hundred years ago masturbation was thought to cause physical degeneration and be a sin, today it is perceived as healthy, even recommended. Research shows that adolescent girls who masturbate have more and stronger orgasms as adults. So, if anal ...


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My answer to this question would be pretty straightforward. From a neurobiological standpoint, sex causes the release of various pair-bonding influencing hormones oxytocin, vasopressin and dopamine. These "feel good" hormones promote bonding and basically encourage the couple to stay together. The more the pair have sex, the more these hormones get ...


4

This is in reply to your first question. Taste – in food, music, and sex – is in part a result of imprinting. You find women or men attractive that are like your parents or the community you grew up in because of sexual imprinting (e.g. Aronsson, 2011). Aronsson writes of a sensitive period where this imprinting happens, but I am not so sure that the ...


3

What is the difference in the brains for animals capable of these great differences in sexual activity and what part of the brain is responsible for this? In my opinion is a matter of creativity and curiosity. Evolved species try to interact with their ambient in unusual ways, testing different approach to the same "problem" not only to satisfy ...


2

The following comes from my research experience using fMRI to study the human visual system. Overall, peoples brains are similar to each other on higher scales, and become very different from each other as the scale becomes smaller. Differences between different people start with brain size and sulci patterns. Also male and female brain anatomies will be ...


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Looking for acknowledgment is so important trait that some authors extracted specific contruct which can be responsible for this tendency - need for social approval. Polish researchers use Social Approval Questionnaire (by Drwal, 1995) next to the other tests, in order to exclude from their data base unreliable responses. It can be interesting for you what ...


1

There are two very broad domains of theory that commonly address the double standard regarding promiscuity. Haven't got the time to lay it all out at the moment (would be happy to edit later to elaborate if you like; just comment on what aspects you'd like expanded!), but as you suspected, both biological and social factors pertain in ways that are essential ...


1

In chimpz, we see stronger chimps beating up weaker chimps that have consensual sex. Basically sex is not a purely consensual matter among chimps. It's to the best interest of stronger males to prohibit weaker males from entering mating market especially if the weaker males are more attractive. In gorilla, sex is not about consent at all. The stronger ...



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