It's quite rare to see "porn" in horror movies, I agree that if there are porn scenes implemented in order for shock effect it can get a bit misplaced (like in some 70s horrors: The Beast, Malabimba and Thriller). But some simple t&a shouldn't be so upsetting for adults. I suggest you don't watch any of the Nekromantik films though.

I would like to recommend Last Man on Earth (1964), it might not be so scary to today's audience, but it's a real classic with Vincent Price in his prime. Also, Ravenous (1999) has a quite effective atmosphere which is in a large part due to the terrific score.