http://www.patient.co.uk/doctor/Puberty-Normal-and-Abnormal.htm females: adult pubic hair average age 14.6, adult breasts average age 14.5, so my bad it is 14.6 when they reach full adult sexual maturity. As for peak fertility, I cannot easily find studies that start below the age of 22, however the claim that females reach their peak fertility between the ages of 23 and 31 is clearly false re: http://www.boston.com/lifestyle/health/blog/inpractice/age.jpeg which shows a sharp decline starting at age 24. What the study you quoted meant by "females reach their peak fertility between 23 and 31" is that females fertility rapidly declines starting at age 23 to 31, which is made clear by the graphs. I cannot find a citation for when females *begin* their peak fertility, but it is clearly not after the age of 22, and none of the studies I can find show information on teenagers right now. In the past I read that teenagers reach their highest degree of fertility a few years after the onset of puberty, I believe at about age 14.5, which is also when they on average reach their adult sexual level of physical development. So no, I am not wrong, you are wrong. http://www.boston.com/lifestyle/health/blog/inpractice/2011/11/pregnancy_now_or_later_1.html see the problem is that all of these studies start at around age 22, but regardless you are clearly misinterpreting their strange use of the word "hit their peak", which actually means that they begin their decline. You can clearly see this on the graphs that I linked to, where after age 23 a sharp decline in fertility takes place, with fertility between age 22 through the end of 23 being stable. The resolution of these studies is not high enough to compare the fertility of a 14.5 year old to a 22 year old, although I am pretty certain they will be the same (and less prior to 14.5, which is why I would say a female hits her peak fertility at the age of 14.5, not hits her peak at the age 23, when it is obvious from looking at the graphs that the decline in fertility actually starts toward the end of 23 start of 24). This is in contrast to the chart I linked to (and I can find many other charts that look the same), where is shows a 22 year old is significantly more fertile than a female in her mid to late 20s. Here are more charts showing the same thing: http://assets.babycenter.com/i/infertilitygraph.gif http://qfg.com.au/about-fertility/female-reproductive-system/effect-of-age-womens-fertility Another point that has become apparent to me is that fertility unfortunately means two things, it means the probability of a female becoming pregnant and also the rate at which females become pregnant. A 30 year old is much less likely to become pregnant than a 22 year old, but when the term fertility is used in analysis of pregnancy rates, it is apparent that far more 30 year olds become pregnant than 22 year olds: http://www.ined.fr/en/everything_about_population/graph_month/age_fecondity/ This introduces ambiguity to the term of fertility, as I am trying to find the age when a female is most likely to be most capable of becoming pregnant regardless of her desire to attempt to do so, not when a female is most likely to try to become pregnant regardless of her ability to do so. It is possible that the studies you have quoted with particularly outlandish numbers (late twenties to early thirties) for the first definition of fertility are actually discussing the second definition of fertility, and that would make sense as well. That is not a technical definition of sexual peak and is thus irrelevant as far as I am concerned. But the studies linking child porn to 1000% of child sex abuse on the other hand have controlled for all variables? The studies showing a fall in child abuse when child pornography viewing is legalized have taken place in several different countries in several different time frames, that will help control for many variables. There was essentially no virtual child porn when the Czech study in particular was carried out. The US was not one of the countries studied as child porn is not legal to view there. I guess a good study in the US would be to look at child sex abuse rates before CP was made illegal, compare the child sex abuse rates after CP was made illegal and then compare that to child sex abuse rates when internet child pornography became extremely popular despite its illegality. My guess is we will find a spike in child abuse cases after child pornography was made illegal to view and a drop in child abuse cases correlating with the rise of the internets popularity and the amount of child pornography made available through the internet. This seems like an argument for me to post so I have no comment. "Is it better that we cause more children to become molested, or better if we prevent more children from becoming molested while allowing pedophiles to look at images of children who were already molested in the past, and are never going to get less molested in the future".