[DungeonMaster]

If a wife says no, and the husband forces himself on her, is it rape? Your opinion appears to be that it is not, because of the "social contract" for sex included in the marriage.

That's not the situation we have here is it.

[MortMan]

It is similar. The prostitute has an implied "duty", because of her "job", to perform sex acts. The police officer uses the threat of arrest to coerce her into performing against her will.

You have no legal basis for your opinion, sir.