Some refer to it as retarded maturation. And the possible contributing list of factors??? Pretty much everything.

..where does one start...the ever increasing doting, coddling mothers, fragmented families, hormones in the meat, synthetic estrogen-like chemicals flooding everything, poor parenting by immature parents themselves, lack of respect amongst the parents, lack of positive role models, the media and adverts..video game recluses that do not develop good social skills..lack of opportunities available..piss poor education system (aka daycare)..drugs..instantanous gratification.

just to name a few. anybody else care to add