[Wuli]

I have read from an increasing number of sources over the past two years two areas of brain research -

that the brain is more plastic than was previously believed, that the “wiring” does help shape the thoughts AND our thoughts CAN shape and change the wiring (where activity is increased or more focused and where more synapses are needed or must be used more frequently)

and our bodies respond more deeply than previously believed - down to the metabolic and hormonal levels, to sustained brain activity.

I make this point out of curiousity in wondering if the lowering of sexual activity and interest in sexual activity to much younger ages in the past fifty years, can be part of why it is found that not only has the age of puberty gone down for females, it is now found to have gone done in males as well.

Is what is going on in the little brains signalling to the body to get prepared for sex - sooner?

[generally]

I think you are correct. Did you read “The Brain that Changes Itself” ? I highly recommend it. Warning: One very creepy chapter on sex. Scientific and very educational, not porn, but creepy nonetheless.