Talk:Pretty Boy: Difference between revisions

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::Might it also be the case that the increase in the prevalence of pretty boys indicates a possible decrease in sexual dimorphism between men and women? If this is indeed the case, then hypothetically speaking, it hints at selection toward monogamy. We can infer this from the fact that male Gorillas are nearly twice the size of female Gorillas, indicating a polygynous mating whereas the Gibbon (whom features a monogamous mating system) has almost no sexual dimorphism. The reason for this seems to be because of male competition over access to females. In polygynous systems, like that of the Gorilla, male-male competition over females is intense and will result in only the largest males mating with all of the females, whereas in the Gibbon male-male competition is scant and thus there are no selective pressures for males to be larger. Thus it follows that if male-male competition is abated, sexual dimorphism will reduce. It seems to be the case that humans have undergone a significant reduction in sexual dimorphism since we were still hominids. As our recent ancestors exhibited a polygnous mating system, the introduction of monogamy has caused a long-term reduction in sexual-dimorphism overall.  
::Might it also be the case that the increase in the prevalence of pretty boys indicates a possible decrease in sexual dimorphism between men and women? If this is indeed the case, then hypothetically speaking, it hints at selection toward monogamy. We can infer this from the fact that male Gorillas are nearly twice the size of female Gorillas, indicating a polygynous mating whereas the Gibbon (whom features a monogamous mating system) has almost no sexual dimorphism. The reason for this seems to be because of male competition over access to females. In polygynous systems, like that of the Gorilla, male-male competition over females is intense and will result in only the largest males mating with all of the females, whereas in the Gibbon male-male competition is scant and thus there are no selective pressures for males to be larger. Thus it follows that if male-male competition is abated, sexual dimorphism will reduce. It seems to be the case that humans have undergone a significant reduction in sexual dimorphism since we were still hominids. As our recent ancestors exhibited a polygnous mating system, the introduction of monogamy has caused a long-term reduction in sexual-dimorphism overall.  


My speculation amounts to this, the increase of the prevalence in pretty boys signals a possible decrease in sexual dimorphism which would indicate selection toward monogamy. However, I find this hard to believe since rates of infidelity and divorce are much higher than they were only 70 years ago; sexual debut amongst teenagers seems to be earlier and earlier with each passing day (something typical of r-selected behaviour). I find this quite perplexing as to why there might be an increase in androgyny but a simultaneously shift away from monogamous behaviours. I was wondering if any of you had any ideas that could possibly remediate this seemingly contradictory set of events.
::My speculation amounts to this, the increase of the prevalence in pretty boys signals a possible decrease in sexual dimorphism which would indicate selection toward monogamy. However, I find this hard to believe since rates of infidelity and divorce are much higher than they were only 70 years ago; sexual debut amongst teenagers seems to be earlier and earlier with each passing day (something typical of r-selected behaviour). I find this quite perplexing as to why there might be an increase in androgyny but a simultaneously shift away from monogamous behaviours. I was wondering if any of you had any ideas that could possibly remediate this seemingly contradictory set of events.
::-K


: Perhaps we can refer back to CSR selection model? [[Life history theory]] has some new hypothesis on the discrepency between stabilty and polygamy. People who supports monogamy are often more sexually dimorpic, whilst those that are more hypergamous are more likely to be biologically masculinized (female selectivity increases as her Digit Ratio increases), constrastly those that are more polygamous are more likely to be biologically feminized.
::: Perhaps we can refer back to CSR selection model? [[Life history theory]] has some new hypothesis on the discrepency between stabilty and polygamy. People who supports monogamy are often more sexually dimorpic, whilst those that are more hypergamous are more likely to be biologically masculinized (female selectivity increases as her Digit Ratio increases), constrastly those that are more polygamous are more likely to be biologically feminized.
 
:::I'm not extremely well versed in the CSR selection model, but from a cursory reading from the article I believe I've abstracted the gist of what you were hinting at. It seems that a transition from femminism to traditional patriarchy explains some of the behaviours. It explains why marriage rates are down and divorce is up as, though we don't have actually polygamy, we do have de facto polygamy via serial monogamy. As a result, fertility rates are down, women are reaching menarche 5 years earlier on average today than 100 years ago and there's a scarcity of long-term male mates. However, this competitive strategy wouldn't explain the rise in androgyny and the genral decline in male testosterone over the years (see the Gorilla point). Could it be that other enviromental factors affecting phenotypic expression but the do not create selection pressures for more femminine genes in men are at work(like increased consumption of soy)?


-K


== Fraternal Birth Order and Maternal Age as Main Focus ==
== Fraternal Birth Order and Maternal Age as Main Focus ==
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