Lack of Consideration. 1  Past consideration is not valid. Something that is already done is done, and it does not change the legal position of the promisor. 2  Preexisting duty does not count as consideration. 3  An illusory promise, or one which the promisor actually has no obligation to keep, does not count as consideration. The promise must be real and unconditional. This doctrine rarely invalidates contracts; it is a fundamental doctrine in contract law that courts should try to enforce contracts whenever possible.
In parts of the world with more conservative social traditions, the average would be considerably higher. i had mine when I was 13 but idk if thats the average age. I would the average age would be from 12 to 15. I had mine when 13, so I would say that is around the average age, but that is just speculation.
Emeritus Professor Norbert Kluge of the Universitaet UniversitÃ¤t-Koblenz landau wrote in The internet Publication beitraege BeitrÃ¤ge zur Sexualwissenschaft und sexualpaedagogik sexualpÃ¤dagogik that girls in 1992 had their first period on.average at 12 2 years old and in 2010 will have it around 10 or 11. years of agefrican-American girls develop earlier than white girls by 1-1.5 years. The mean age at onset of breast development is 8.87 years for African-American girls and 10.51 years for white girls. The mean age at onset of axillary (armpit) hair growth is 10.8 for A.A. girls and 11.8 for white girls.