黑色少年与他的坏笑白色少女与她的微笑
[hēi sè shăo nián yŭ tā de huài xiào bái sè shăo nǚ yŭ tā de wēi xiào]
This can be translated as 'Black Youth with His Naughty Smile, White Maiden with Her Sweet Smile.' It vividly contrasts and compares characters from opposite genders, highlighting differences in personalities as perceived by the user.