Deeds of the flesh Part 1

First let us note that all of the deeds on this list are a possession of the flesh, (old sin nature) and are displayed through us by our yielding to that nature.
Immorality is listed first, and it is the Greek word πορνεία (G 4202) porneía, gen. porneías, fem. noun from porneúō (G4203), to commit fornication or any sexual sin. Fornication, lewdness, or any sexual sin. [1]
Sexual sins are very harmful, in 1 Corinthians 6 we read “the immoral man sins against his own body”. The word in this verse for immoral is also πορνεια. The harm done is both mental and physical. One who is caught up in this type of sin looses their ability to correctly view a member of the opposite sex. The further along one travels down this path the more that they lose the ability to discern between what normal and abnormal sexual behaviors are. As time goes by the law of diminishing returns will take effect. What once thrilled now does not, and the sexually immoral person will have to seek new thrills in order to maintain their level of arousal. This will take them to places that they never dreamed that they would go. Eventually they are only an empty shell, emotionally. Physically they risk all sorts of illnesses. The ability to feel pleasure diminishes. Sometimes diminished pleasure results in that person seeking pain in order to obtain satisfaction.
God has a provision for sex, and it is within the bounds of marriage. This boundary protects us from the dangers of sexual immorality. In 1 Thessalonians 4:3-5 we see that abstaining from sexual immorality is the will of God. In 1 Corinthians 7:1-7 Paul explains more about the relationship between married couples. But the aspect that I want you to notice though is that of who has authority over whose body. Each spouse posses the other and by implication should seek the needs and desires of the other. In sexual immorality the attitude is always that of “me, me, me” that is contrasted with the proper attitude of pleasing the other.

[1] The Complete Word Study Dictionary New Testament