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Hair grows thicker when shaved?
I've often wondered - is there any truth in the commonly stated belief that rate/quantity of hair growth depends in some way on hair length (i.e. shaving makes hair grow back thicker)? It would be nice to see some information on this in the article.
most information i've seen says that the hair only appears thicker because it's shorter at first, or else because one begins shaving right as the hair would have come in thicker anyway, it creates false causality. still, it'd be a difficult thing to prove, wouldn't it? one would probably need twins.
- There's no truth to it. You also wouldn't need twins - it is reasonable to suppose that hair in the same area would have similar growth rates, so just try shaving a patch and comparing it to the unshaved "control". You'll find that when it grows back, it is indistinguishable from the originally unshaved patch.Graham 12:58, 9 February
All hair has a cycle and falls out. Head hair has a longer one before falling out but it grows continously. Body hair grows but then stops growing after a period of time and eventually drops out sooner than head hair.
men hair lengh
the article says:
Before the First World War men generally had long hair and beards.
is there a ref on this? Xah Lee 13:38, July 15, 2005 (UTC)
Good call Xah, I’m going to have to raise the BS flag on this one; the masculinity of short hair in western culture stems from the Roman army not the Great War.
- It's true though, I mean, it had never really taken off outside of cultures that had pedo-homosexual tendencies and wanted men to look like little boys. The romans did start it but it wasn't big in the West in general until lice broke out in WW1.
resolving deleted paragraph
I just removed the following paragraph from the article. It struck me as grossly out of place for several reasons.
Some persons of African descent have hair that if left alone will grow in tight curls and develop into a unique hairstyle known as the afro; since the development of the concept of Black Power, there has been a debate as to whether such persons should use products that straighten their hair.
My issues are:
- Discussion of Black Power doesn't seem neccessary when talking about the structure and properties of the hair follicle. Perphaps this belongs in an section on contraversies about hair style.
- The wording is too focued on an individual instead of the HAIR or a racial group.
- While valid, additional information about properties of other racial hair types would make this more inclusive.
- Black Power? You make it sound so militant. It's not black people who made kinky hair political; it's just the natural texture of their hair. It's analogous to saying a woman is a radical feminist if she doesn't get silicone injections. Rosekelleher (talk) 18:21, 18 July 2016 (UTC)
How long does it take hair to grow back if you pull it out? (OK, so it will probably vary from person to person and depending on what type of hair, so how long would it take, on average, for facial hair to grow back when pulled out?) thanks
Aquatic Ape Hypothesis revisited
I thought I'd changed this back in February but for some reason either I forgot, or something went wrong. As per my comments of 21 Feb 2006, I now propose to rewrite paras 3 through 5. Though some edits have been made to that section in the intervening period, I don't think they've contributed anything substantial nor solved the problem of clunky English. The new para 5 seems superfluous. It just expands on the Fisherian hypothesis, though with some useful references. It would be better just to add these to the links section. Consequently, I propose to keep the wording that I proposed earler. Your comments would be appreciated.
Proposed new text:
Several theories have been advanced to explain the apparent bareness of human body hair. All are faced with the same problem that there is no fossil record of human hair to back up the conjectures nor to determine exactly when the feature evolved.
Savanna theory suggests that nature selected humans for shorter and thinner body hair as part of a set of adaptations, including bipedal locomotion and an upright posture, for a nomadic hunter-gatherer lifestyle on the African plains. There are several problems with this savanna theory, not least of which is that cursorial hunting is used by (other) animals that do not show any thinning of hair.
Another theory for the thin body hair on humans proposes that Fisherian runaway sexual selection played a role here (as well as in the selection of long head hair). Possibly this occurred in conjunction with neoteny, with the more juvenile appearing females being selected by males as more desirable; see types of hair and vellus hair.
The Aquatic Ape Hypothesis posits that sparsity of hair is an adaptation to an aquatic environment, but it has little support amongst scientists and very few aquatic mammals are, in fact, hairless.
I see someone has swapped out David Luiz for Rand Paul. Please explain. David Luiz has curlier hair, and more of it is visible, making him a much clearer example, and he is not a divisive political figure. Rosekelleher (talk) 18:09, 7 June 2016 (UTC)
The section on Texture should mention porosity, since that has an effect on hair's appearance and care. It should also mention density. (Volume is not the same as density. Hair can be low-density and have a lot of volume because it's curly; straight hair can be high-density and lack volume.) As I understand it, the four main things that make up texture are curl pattern, density, porosity, and width (of individual strands).
Many people are confused about the words "fine" and "coarse". I was always told my hair was coarse because it was frizzy and not smooth, but the individual strands are not coarse (thick).
Same with the words "thick" and "thin". When most people say "thick hair", they mean voluminous hair; others are referring to the thickness of the individual strands. To clarify all these terms once and for all would be a public service.
There are a couple of statements that don't sound right to me, though they are sourced; this may due to the confusion about terms. Under Texture: "Coarse hair has a more open cuticle than thin or medium hair causing it to be the most porous." Really? Many people have fine, porous hair or coarse, low-porosity hair. Also: "Type 4 is kinky hair, which features a tightly coiled curl pattern (or no discernible curl pattern at all) that is often fragile with a very high density." Type 4 hair usually has a lot of volume because of the curl pattern, but it's not necessarily dense. Lots of people have low-density, kinky hair. And this statement is contradicted elsewhere: "...although African people's hair is much less dense than its European counterpart's". Does this look like "low-density" hair to you?  Is there really any difference at all between the average density of African vs. European hair? Has anyone actually done a study in which they counted the number of follicles per square inch? I'm guessing that what the original author meant by "less dense" was curly hair's tendency to spread out. But that would mean that when you straighten it, it's no longer dense. That's not what most people mean by hair density.
Not sure what is considered a reliable source for hair-care-related info. Who writes scholarly articles about this stuff? I'm not a scientist, just someone who's been lurking on natural hair websites for a while and reading articles and comments by people with different hair types. Rosekelleher (talk) 18:02, 18 July 2016 (UTC)
New book about hair "no longer attached to the head" ("wigs, toupees, rope, embroidery, paintbrushes, fertiliser and proteins")
Maybe relevant if someone wants to write a section (or perhaps a new article): Entanglement: The Secret Lives of Hair by Emma Tarlo Oneworld Publications, 2016. This is a social history of hair "no longer attached to the head" ("wigs, toupees, rope, embroidery, paintbrushes, fertiliser and proteins") by an anthropologist. Jodi.a.schneider (talk) 13:04, 11 August 2016 (UTC)