As we may have known that newly wedded couples will likely to perform sexual intercourse on the night of their wedding. This is normal in every culture and it is the right way to begin every human's sexual lives. Sex is an element that exists in every marriage that extends the love and care for the sexual needs on their partners. These couples have had mutual matrimonial consent and contract on giving up themselves to their spouse. In other words, sex is only to be satisfied by our spouse. A sexual engagement is not only to fulfill the partner's desire on sexual needs but also to bring closer the intimacy and understanding towards each other. It's a form of love language that should be shared by married couples. Other than that, every couple would like to have their own children, so in order to supply to their needs for children, sex comes in as a part of reproduction activity.   
                           
Teenagers in this modern society have become more influenced on sexual activities. Statistics have shown that the rate of premarital sex increases from year to year. This sexual activity is considered as sinful in religious term but why are these teenagers doing it? It happens because the lack of understanding their roles in sexual activities which leads these poor teenagers to a weak foundation of preserving themselves for later sex in marriage. The outcome of a teenager losing their virginity is a less happier marriage. This is so because the expectation of sexual satisfaction could be higher on their spouse as they have already engaged in such activities before. As I have stated, sex is only good in marriage and best when happens with your spouse in marriage. In order to enjoy sex as a part of marriage, one must preserve their virginity for their lawful spouse. Premarital sex is usually conferred as cheating our spouse in future when we get married. Parents should be open and not shy to share about sex education to their love ones at home. It is always the best idea to tell your children of sex and it's real meaning in live rather than someone else telling them. I think that every teenager in this modern society should be taught sex education to decrease premarital sex and to help them to answer their queries and wonders on the word sex.   

Sex on the influenced in society has created activities like prostitution and homosexuality. Prostitution is a form of granting sexual favors for payment. There are various types of  prostitution exist in this modern society, including male and child prostitution. A key aspect of modern prostitution is that the prostitute and their clients are generally unknown to one another.Sexual needs being satisfied by a stranger would be a bit out of the point in the real meaning of sex. Even though clients might be 'regular customers', the relationship is not initially established on the basis of personal acquaintance but through sex and money. On the other hand, homosexuality exists in all cultures. The idea when someone speaks of homosexual person will be someone way off in terms of sexual tastes from the majority of the population. In non-western cultures, homosexual relations are encouraged, in a certain small group. In northern Sumatra, the Batak people permit male homosexual relationship before marriage. At puberty, young boy leaves their parents' house and live with a dozen to fifteen males of his age or older. Sexual partnerships are formed between couples in the group. The situation continues until young men marry. Most and not all that after marriage will abandon homosexual activities. These sexual influenced on the society are mainly one of the cause for AIDS and STD.   

In summary on my philosophy on sex, I am sure that sex within marriage is much safer and enjoyable than any forms or kinds of sexual activities in the society or premarital sex. The consciousness of humans between what is right and wrong in terms of sex should be taught in family and through the guidance of parents and not through self-seeking for the answer which may be wrong.