Where exactly in the Bible does it say homosexuality is a SIN?

Its implied. Homosexuality is an act of foreign worship so is heterosexuality outside the confines of marriage. Both acts are of pagan origin. Homosexuality was common worship among the Sodomites, and still is practiced among Satan worshipers and Wicca. It is practiced as sex magic and if you do a little bit of extensive research you will find that the Gay Pride movement was fronted by Alister Crowley, writer of the Satanic Bible and one of the founders of the Satanic Church. He started the movement to destroy families, defile the church, and destroy family values. So not only is it a sin, but it is pagan/satanic worship, God destroyed his Holy Priests for some type of foreign worship, he even killed them for burning foreign incense. You may need to be delivered from the demonic powers behind homosexuality through prayer, you would be wise to repent and turn to Jesus Christ for the salvation of your soul.