Modern culture has tried to redefine sexuality as a personal right to be exercised any way an individual wishes. Sexual behavior is considered a personal choice, akin to the decision of whether to buy a house or rent a condo. At the same time, popular opinion has all but removed the word sin from our culture’s vocabulary. The only sexual expression considered “wrong” is what is deemed distasteful to the definer. However, social acceptability varies so greatly that even the vilest of acts would be considered justified by many. So, before we can determine why sexual sin is such a big deal, we have to define sexual sin. Fortunately, man has never been given the privilege of defining sin. The One who created sexuality also has the right to set the boundaries for it, and the Bible is clear about the guidelines.