The following is a link to a very good blog.

Randy Alcorn wrote a very good book on Heaven. He is a theologian, and a writer. He teaches at a seminary.

http://www.epm.org/resources/2010/Jan/28/guidelines-sexual-purity/

Interesting: These Family Talk episodes were very good too:

http://www.oneplace.com/ministries/family-talk/listen/

The three “girls uncovered” episodes are extremely informative. Family Talk is Dr. James Dobson’s program.