Onan opposite note i heard a radio show call for permanent incarsaration to all sex offenders no matter how small the offence ie. inappropriate touching because he believes you will escalate and get worse. He quoted a statistic that says 96-98% will recommit crimes or worse.
In believe you serve a punishment that is in line with the offence and dont focus on what you might do later. And all punishment ends at the end of the sentence.