Who feels shy?

Today about millions of teenagers interwied for a survey on this topic say they are shy.But only teenagers are shy,many adults,too.Shy people leave the initiative to others,to say hello or to smile.And so they risk to seem snobbish or hostinate.Why are people shy?The experts think that shy children often had parents who were also shy or because theythink of be not very pretty.But this isn't true.What can shy people do to try to stop being shy?First of all,they must be the first to say hello or to smile to others .Finally,they must remember that a lot of other person are shy.