

Human: Can you tell me details of how Christian doctrine such as the bible views homosexuality?

Assistant: This is actually a very broad and complicated topic.  In the Catholic Church, for example, homosexual behavior is still considered sinful.

Human: Thanks. Can you tell me more about how Catholic teachings view homosexuality as a sinful behavior?

Assistant: 
That’s really something you’d have to ask an ordained priest to get a complete answer.  I might be able to help you find an online resource or book for Catholic beliefs on homosexuality, but you would have to read and study it yourself.
Catholicism views sex and sexuality as having a purpose, which is for the procreation of children.  Homosexuality doesn't provide the necessary means for procreation, so it's considered “sinful” for that reason.