It should not be taken lightly, nor left to chance or hormones.
It should be taken as seriously as any other major decision in life--with prayer, careful investigation and family involvement.
Just as Allaah imposed the condition of chastity on women, meaning that they refrain from zinaa, so it is also imposed on men. So they should be ghayr musaafiheen, meaning they should not be adulterers who do not refrain from sin and do not refuse any who come to them (for immoral purposes).
All those stories of media and movies are not helpful to make a person comply with the teachings of Islam.(Lawful to you in marriage) are chaste women from the believers and chaste women from those who were given the Scripture (Jews and Christians) before your time, when you have given their due mahr (bridal money given by the husband to the wife at the time of marriage), desiring chastity (i.e., taking them in legal wedlock), not committing illegal sexual intercourse, nor taking them as girlfriends.