Homosexual behavior occurs and develops much the same as any other sin. Many Homosexuals are introduced to it as children through molestation etc. Recruitment into the practice plays a major role. The power of suggestion, (children set up to ridicule and teased plants the notion in their head). The Scripture teaches that there is Pleasure in Sin for a season. After that comes Judgment.

I personally believe that Homosexuality is a Spiritual condition. Demons are spirit beings, their job is to infect the thought processes in individuals and convince them to follow their lower nature, the sin nature. Heterosexuals, those who choose Homosexual, and those who are not sexual at all can be influenced into some form of besetting sin. Virtually everyone who is willing to "set aside the sin that doth so easily beset them" can repent. Salvation and 'deliverance' can be theirs through the provisions of Calvary.