The urge for sex before marriage is only for enjoying sex without any commitment
even somewhere the animal act of sex is with multiple partners cbut are for reproduction and stays together with their mate till the child grows up is more responsible act than human.
The person who wants sex before marriage and compare the act with animals,should either may decide to not to marry in future and should have sex only with prostitutes male or female
If doing sex is treated as an act which is not related to marriage then after marriage we may tend to have sex outside the marriage by applying the same logic
The true feeling of faithfulness is attached to sex with marriage, as after marriage its felt as soul mating through sex
The child born through these human who can give this faithful gift to marriage will be a child faithful to the parents and to the society
For understanding the impact of no sex before marriage can be identified with as much as can be identified with as much as requirement of marriage legitimate and trusted relation between a man and women in society for a better society and country
Better to adhere to relegious norms which is made for body and life style.