You are correct that Jesus never spoke on sex or sexuality. There are a number of subjects that Jesus did not speak on, and not everything he said or did was written down. He did say in Matthew 5:17-18, "Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished.”
2 Timothy 3:16-17 says, “All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the man of God may be thoroughly equipped for every good work.”
If we look at the disciples as men with their own opinions and agendas, rather than vessels of God having been transformed by the Holy Spirit and their time with Christ, then really the Bible is of no use to us. We might as well make up our own religion. The Bible is something that has deep meaning as a whole. To look at parts cynically, rather than asking God for understanding and revelation and how our lives should be viewed through the lens of scripture, is not Christianity or using scripture as God intended.
Jesus came to set us free, however not to sin. Sin is a bondage that Christ wants to free us from. Romans 8:1-4, “Therefore, there is now no condemnation for those who are in Christ Jesus, because through Christ Jesus the law of the Spirit of life set me free from the law of sin and death. For what the law was powerless to do in that it was weakened by the sinful nature, God did by sending his own Son in the likeness of sinful man to be a sin offering. And so he condemned sin in sinful man, in order that the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit.”
