I appreciate everything you say here but I must add in that some people are able to experience climax through means other than the usual, ie g-spot or clitoral / cock or ball stimulation. I know I have come, pun intended, very close to orgasm through stimulation of my breasts alone and I have read many counts of similar tales, both in men and women and in fact on these boards I have read about the use of a Dom/mes voice alone to command reaching climax.
I know that the times where I have cum anally I have been in a very heightened sexual state and my orgasms were borne of both physical and mental stimulation.