Is homosexuality sin?

In our society today, we hear many things like, “What is true for you is not necessarily true for me.” The guiding principle for many people is “You do you” or “do what feels good.” But what about when this idea is applied to morality or deciding whether things are right and wrong? Is “stealing is wrong” a negotiable truth as long as it seems right to me? What about murder? Or homosexuality? Can we apply this thought to morality or is morality decided by something outside of ourselves?

One way this idea is applied today is to sexuality. Some say that if they have the attraction to a certain person, then “god” created them that way. Therefore, they believe they have the right to decided whether it is right or wrong to pursue someone of the same gender. But what does the Bible say about it? And was the Bible’s mandate cultural for the time it was written or is it something that is true all time, no matter the culture or tradition?