Scientists identify why girls often mature faster than boys. For example, autism spectrum disorders are almost 5 times more common among boys (1 in 54) than among girls (1 in 252). We take you through an interesting thought curve that supports this answer. Maturity thy name is woman (?) let us begin with the scientific side of how and why women have a more matured behavior than most men their age. Girls hit puberty earlier than boys, by at least 2 3 years. An 18 year old boy is basically a 13 year old girl, in terms of maturity! People would say. Girls just grow up so much quicker! Theyre so much more mature. Why girls are more mature than boys and men are more mature than women. Maturity is often described as a comparison between which sex is stronger women or men. For example, girls, with the exception of few, are usually the quiet ones in a classroom compared to the boys, and this behavior results in the teacher concluding that girls are more mature than boys but the teacher reached that conclusion without taking in the fact that girls, in our patriarchal society, are conditioned to conform to authority more than boys, resulting in them being quieter.