1) Romans 1:26-32: The people in Romans 1 started on the pathway to destruction by failing to thank and glorify God. From there they fell into idolatry and then into homosexual (gay & lesbian) behavior.
2) Sodom & Gomorrah (Genesis 19:4-13) – shows the potentially violent side of homosexuality
3) Male Prostitution (Deuteronomy 23:17-18, 1 Kings 14:24): Shrine prostitution was a common practice in the land of Canaan. Male prostitutes engaged in sexual activities with the men (and women, if allowed) who came to worship in the shrines. God abhorred the homosexual activity and prostitution, and warned the Israelites to have nothing to do with them.
4) Mob in Gibeah (Judges 19-20): This is story is similar to the Genesis 19 story of the homosexual mob.