[header] How to guard yourself from sexual immorality [title] Figure out how you define " sexual immorality " for yourself. [step] This may depend upon your own religion and philosophy and will be unique for each person. For example, many branches of christianity define sexual immorality as copulation before marriage, but there also may be many steps before that to think about. 
Some people consider kissing before marriage to be wrong and others consider undressing in front of each other before marriage okay as long as you don't have sex. What you define " sex " to be will differ from what others define it as.