deviate:
1. To turn aside from a set course or route.
2. To veer off the intended path.
3. To stray away or differ from the original plan or purpose.

a pervert's pervert

1. Any person who will try to capitalise on every opportunity that presents itself that has even the slightest hint of a sexual nature.
2. A person who does not take the legal age bracket into consideration when trying to score
3. A person who will engage in sexual intercourse with anything.

To devise, or plot a scheme of wholly evil intent.