Its like a macro in Microsoft Word. This includes things like pre-marital sex, masturbation, pornography, sex outside of marriage, etc. The reason why I picked this subject is that it is easy to relate it to this subject and the issue of flesh rebelling against the ways of Jesus. God has given us the gift of sexuality and the desires that accompany that - but what sin does is comes along and perverts that very good thing and turns it into a selfish thing, a sinful thing. God created sex for much deeper purposes than for just the experience itself.
Sex is as much spiritual mystery as physical fact.
There is a sense in which sexual sins are different from all others. The physical part of you is not some piece of property belonging to the spiritual part of you. God owns the whole works. So let people see God in and through your body. Okay, so we acknowledge that there's not only a war within us but also a seemingly futile war at that.