God views foreplay outside marriage as wrong. We get a glimpse of this is Ezekiel 23:3, where God, to portray the waywardness and apostasy of His chosen people, uses the picture of virgins in passionate sin: “In that land their breasts were fondled and their virgin bosoms caressed.” (If you’ve ever argued that God doesn’t address “petting” in the Bible, let Ezekiel 23;3 serve as a corrective to your thinking.) Just as instructive is the overall thrust of New Testament teaching on sexual purity and the application of their standards mentally as well as physically. From God’s viewpoint, sex is more than being inside a woman.
Nevertheless, I [Jesus] have a few things against you: You have people there who hold to the teaching of Balaam, who taught Balak to entice the Israelites to sin…by committing sexual immorality. (REVELATION 2:14, emphasis added)