Necrophilia?

Law Professor Ann Althouse, at her eponomous blog, talks about Egypt considering a law to allow sex between a surviving spouse and the deceased, for up to six hours after death.  In the comments is this:

If you had to make a law defining what constitutes a crime with respect to the treatment of a dead body, how much leeway would you give to the new widowers and widows?

My first question would be "why is "necrophilia" illegal anyway"?

Is it because there's no known way for the deceased to express consent?

I thought that was a funny comment, in a twisted sort of way.

Then we have this question:

I don't know how things go on a mountainside in Colorado, but isn't it conventionally "till death do you part"?

Then there are all those questions about the right to privacy.  Privacy should not be too quickly dismissed.  Just because "A" wouldn't do something doesn't mean we should have a law preventing "E" from doing it.

Regards  —  Cliff