I really didn't think that was the case (they did so much that other stuff wasn't appealing anymore) with most homosexuals. I thought most just really believed that is was right and they just liked the same sex and it is natural for them.
With some possibly. Others have had bad expirences with the opposite sex, so they clicked with those who shared similar expirences of the same sex. Some may have felt they were missing something in life, and sought homosexuality as an answer. I'm sure as with many other things, there are endless possibilities of why. But we were created in God's image, and we are most successful the closer we reflect that. Hence it is important to direct homosexuals to god's purpose for them, and as they bring their lives in harmony with that, they will indeed find gayness in its puriest form.