Easy. Just walk righ up to the girl you like and kiss her. If she kisses you back, you're a man. If not... run fast.
wen you are born
You can't become human, you are born human.
Physically - you grow into it naturally. Mentally and otherwise - you make choices of integrity - meaning you consider the benefit and welfare of others in the decisions and attitudes you take.
Martin Heidegger (1889-1976), the German philosopher