少女心成熟男
[shăo nǚ xīn chéng shú nán]
'Shàonǚxīn chéngshú nán' translates to 'A mature male with girlish/innocent heart.' Here it describes males who possess the balance of both feminine sensitivity (innocence/gentleness/finesse often associated traditionally with girls) and masculine stability and reliability usually attributed by society to adult men.