Your 25 year number is for premeditated murder right?  Manslaughter is killing by another name.  What are the sentencing numbers on manslaughter?  Reviewing national averages sentences are in the up to ten-year range.  Yes, there is support in the community for longer sentences and life monitoring on sex related matters, but not for the reasons you give.  Sex in this country is a political issue, a gender issue, a religious issue.  Just as "witches" and heretics were once burned at the stake, so today "sex offenders" even those who only put their hands in some pants, are figuratively burned at the stake for offenses that exist primarily in the mind.