I have real doubts about Pelly. S/he rarely responds when you offer her the advice she asks for. Though she has responded a few times, quite enigmatically, on this thread.
By the way, was there a link posted that Matthew has removed?
But in answer to the original question:
As atheists deny the spiritual life, their sex life can only be physical, and a very poor substitute for the union of man and wife as our loving God meant it to be.