Because the body is the temple of the Holy Spirit, any abuse, such as intentional infestation of parasites and sexual abuse, is sacrilegious and a desecration.

"Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God? 

You are not your own; you were bought at a price. Therefore honor God with your bodies".

                   - 1 Corinthians 6:19-20

If the body is abused, then you dishonor the Lord with your dishonorable and depraved conduct.