They got first choice?does anyone know, im really interested by the difference in size.
First there is the Allen's rule from Biology.
Allen's rule - Wikipedia
en.wikipedia.org
Animals living in cold climates need to conserve as much heat as possible, Allen's rule predicts that they should have evolved comparatively low surface area-to-volume ratios to minimize the surface area by which they dissipate heat, allowing them to retain more heat. For animals living in warm climates, Allen's rule predicts the opposite: that they should have comparatively high ratios of surface area to volume. Because animals with low surface area-to-volume ratios would overheat quickly, animals in warm climates should, according to the rule, have high surface area-to-volume ratios to maximize the surface area through which they dissipate heat.
A test of Allen's rule in ectotherms: the case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges
We studied the geographic variation of three morphometric characters in relation to body size in...www.scielo.br
On Protruding Body Parts
Allen's rule (Allen 1877) is the generalization that the protruding parts of an endothermic *******'s body, such as tail, ears and limbs, are shorter in animals from cold parts of the species range than from warmer parts (Mayr 1942). The gradient in body proportions result from allometric growth of protruding body parts in different parts of the range; this, usually generates latitudinal and/or altitudinal trends in body proportions, so that protruding parts become relatively shorter at higher latitudes and altitudes.
Penis size variation confirms the Allen's Rule:
Geographic variation in human penis size
Can we look at this as simply another study in geographic variation of the human species? Probably not, for males who see this map will undoubtedly find their hands reaching for a ruler. It’…whyevolutionistrue.wordpress.com
The biggest penises are found in populations between the Tropic of Cancer and Tropic of Capricorn.
I have been working in the sunshine.Second - there is sunlight's effect on testosterone. Sunlight boosts Vitamin D synthesis. Vitamin D is needed for testosterone formation.
Testosterone is the most important male sexual hormone. In males it is mainly responsible for the development of the sex organs, the formation and maintenance of the typical male sexual characteristics, sperm production and the controlling of male desire.Sunbathing 'boosts men's sex drives': Testosterone levels rise with Vitamin D increase
Levels of the hormone and the vitamin both decrease from October - at the beginning of the winter months - and reach their lowest level in March because of the weaker solar radiation during this period.www.dailymail.co.uk
Stimulated by UV radiation, 90 per cent of vitamin D in the body is produced by the skin.
Testosterone and body composition:
Sex Steroid Hormone Levels and Body Composition in Men
Background:. Previous studies indicate that testosterone (T) is positively correlated with lean mass and inversely correlated with fat mass in men; howeveracademic.oup.com
In cross-sectional analyses of 821 men, T, calculated free T, and SHBG were inversely correlated with fat mass, weight, body mass index, waist/hip circumference, and waist-to-hip ratio.
It is simply nature. They are born larger and more sexually dominant. Frequent practice hones their abilities until we are captivated by their prowess!does anyone know, im really interested by the difference in size.
Don’t know if i agree with you, it has more to do with the person than skin colourWhether black men are inherently bigger than white boys or not... black men fuck bigger. A lot bigger.
Lots of white guys go for that then black so im sure thats not a balanced ratio. Why don't you go into a nfl locker room and see you talking about lamesI knew a whore that fucked any color man for money. I asked her if black men were bigger, she said no. She said she had bigger white guys than black. She said she bedded a 6-4 tall black guy with a 4 in.cock, she couldn't stop laughing, she couldn't fuck him