1. The beginning of sinful life

    As sense control is the beginning of pious life, illicit sex is the beginning of sinful life. One should not engage in illicit sex, or sex for any reason except having a child with one’s wife. Marriage is meant for begetting children, and in that sense it is a religious institution. Lord Krsna confirms this in the Bhagavad-gita (7.11): dharmaviruddho bhutesu kamo ‘smi. “I am sex that does not contradict religious principles.”

    Srila Prabhupada. Second Chance 13: Ajamila Begins His Degraded Life