Strawmanish there,
1, Gravity exists under the "naturalist" and the Theistic Worldview.
2, Gravity is a material property, Morals are immaterial therefore correct cannot explain morals.
3, "naturalism" is stictly material like gravity, however is used as an explanation of all life. gravity on the other hand exists on any worldview. Morals, an Immaterial property are the main property to life, therefore explanation for morals are required for any worldview which has to do with the origins of life.
4, Gravity exists under any worldview therefore no explanation needed for morals and gravity obviously exists. "naturalism" is about the origins of life therefore explanation for The Immaterial Property of Morals, specifically why rape is objectively wrong is need.
5, rape is Objectively Wrong
6, under "naturalism" rape can be justified and has no reason for being wrong and Immaterial properties don't exist under "naturalism"
7, Since rape is wrong and Immaterial properties do exist. "naturalism" is therefore Factually false.
"atheism"/"naturalism" fails again. nice try, but never ever try to deceive anyone again.