What's So Bad About Making Out and Stuff?

We live in a hyper-sexual culture. Christian boundaries and ideals like purity, chastity, and the idea of one man and one woman forever, are feeling more and more extreme in today's culture. Why do we hold to and teach such extreme views on sexuality? What’s really so bad about making out and stuff? We need to have an answer to these questions for ourselves when we face temptation and for others when they question our beliefs and decisions.