Paul helps people to understand that God's desire is for us to live well. All gifts from God, including food and sexuality, are meant to be enjoyed to the fullest. They can also be misused and if they are people miss out on the joy and purpose intended by God.
Sexual intercourse- Meant to bond a man and women for life. Fornication- Sexual intercourse between people who are not married and it diminishes the full joy and beauty of sexual intimacy as God intended.
God doesn't want people hurt by his grift but instead to experience its fullness in marriage.