What Does The Bible Say About Sex?
"Is cyber sex a sin?"
Answer: The Bible nowhere mentions cyber sex, obviously, because “cyber-anything” was not possible in Bible times. The Word of God does give us some principles that apply to activities such as cyber sex. Philippians 4:8 tells us, “Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.”
There are many Scriptures which indicate that sex outside of marriage is a sin (Acts 15:20; Romans 1:29; 1 Corinthians 5:1; 6:13,18; 7:2; 10:8; 2 Corinthians 12:21; Galatians 5:19; Ephesians 5:3; Colossians 3:5; 1 Thessalonians 4:3; Jude 7). Jesus Himself taught us that to desire something that is sinful is also sinful: “You have heard that it was said, 'Do not commit adultery.' But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart” (Matthew 5:27-28). Proverbs 23:7 says, “For as he thinks within himself, so he is.”
Cyber sex is in its essence desiring something that is sinful (fornication or adultery). Cyber sex is fantasizing about that which is immoral and impure. In no sense could cyber sex be considered noble, right, pure, lovely, admirable, excellent, or praiseworthy. Cyber sex is virtual adultery. It is fantasizing about a person lustfully and encouraging another person into immoral lust. Cyber sex leads a person into the trap of “ever-increasing wickedness” (Romans 6:19). A person who is immoral in his/her mind and desires will eventually become immoral in his/her actions. Yes, cyber sex most definitely is a sin!
"What is a Christian couple allowed to do in sex?"
Answer: The Bible says that “Marriage should be honored by all, and the marriage bed kept pure, for God will judge the adulterer and all the sexually immoral" (Hebrews 13:4). Scripture never says what a husband and wife are or are not allowed to do sexually. Husbands and wives are instructed, “Do not deprive each other except by mutual consent and for a time (1 Corinthians 7:5a). This verse perhaps lays down the principle for sexual relations in marriage. Whatever is done, it should be mutually agreed upon. No one should be encouraged or coerced to do something he or she is uncomfortable with or thinks is wrong. If a husband and wife both agree that they want to try something (e.g., oral sex, different positions, sex toys, etc.), then the Bible does not give any reason why they cannot.
There are a few things, though, that are never allowable sexually for a married couple. The practice of “swapping,” or "swinging/swingers," or “bringing in an extra” (threesomes, foursomes, etc.) is blatant adultery (Galatians 5:19; Ephesians 5:3; Colossians 3:5; 1 Thessalonians 4:3). Adultery is sin even if your spouse allows, approves, or even participates in it. Pornography appeals to the “lust of the flesh and the lust of the eyes” (1 John 2:16) and is therefore condemned by God as well. A husband and wife should never bring pornography into their sexual union. Other than these two items, there is nothing that Scripture explicitly forbids a husband and wife to do with each other as long as it is by mutual consent.
"What does the Bible say about oral sex?"
Answer: Oral sex, also known as “cunnilingus” when performed on females and “fellatio” when performed on males, is not mentioned in the Bible. There are two primary questions that are asked in regards to oral sex: (1) “is oral sex a sin if done before marriage?” and (2) “is oral sex a sin if done within a marriage?” While the Bible does not specifically address either question, there are definitely biblical principles that apply.
Is oral sex a sin if done before or outside of marriage?
This question is becoming increasingly common as young people are told that “oral sex is not really sex,” and as oral sex is promoted as a safer (no risk of pregnancy, less risk of sexually transmitted diseases*) alternative to sexual intercourse. What does the Bible say? Ephesians 5:3 declares, “But among you there must not be even a hint of sexual immorality, or of any kind of impurity...because these are improper for God's holy people.” The biblical definition of “immorality” is “any form of sexual contact outside of marriage” (1 Corinthians 7:2). According to Hebrews 13:4, only the “marriage bed” is pure and undefiled. According to the Bible, sex is to be reserved for marriage. Period. So, yes, oral sex is a sin if done before or outside of marriage.
Is oral sex a sin if done within a marriage?
Many, perhaps most, Christian married couples have had this question. What makes it difficult is the fact that the Bible nowhere says what is allowed or disallowed sexually between a husband and wife, other than, of course, any sexual activity that involves another person (swapping, threesomes, etc.) or that involves lusting after another person (pornography). Outside of these two restrictions, the principle of “mutual consent” would seem to apply (1 Corinthians 7:5). While this text specifically deals with abstaining from sex/frequency of sex, “mutual consent” is a good concept to apply universally in regards to sex within marriage. Whatever is done, it should be fully agreed on between the husband and his wife. Neither spouse should be forced or coerced into doing something he/she is not completely comfortable with. If oral sex is done within the confines of marriage and in the spirit of mutual consent, there is not a biblical case for declaring it to be a sin.
In summary, oral sex before marriage is absolutely a sin. It is immoral. It is in no sense a biblically acceptable alternative to sexual intercourse for unmarried couples. Within the confines of marriage, oral sex is free from sin as long as there is mutual consent.
*While oral sex is safer than sexual intercourse in regards to sexually transmitted diseases, it is definitely not safe. Chlamydia, gonorrhea, herpes, HIV/AIDS, and other STDs can be transmitted through oral sex.