assalam o alaikum

eik cheez observation mein aai hai kay boys aaj kal girls ka fashion ko adopt kar rahe hein... jese certain colors jo girls kayliye specified hein aur vo boys use kartey hein jese pink, red, yello etc... aur jewellary bhi boys use kar rahe hein jese amoman chains, bracelets, rings even ear rings bhi pehntay hein.... why is it so?????