This has brought up a thought provoking point. I have always had brief discussions after the act, I was never told if she did not like it, as she would return the act on me ie. fingering my anus and dragon drilling me. I have tried anal with her once, to which she could not accomodate, I have not asked or 'persuaded' since. I have wanted to come in her mouth, but she has told me that she would not like to. Again, I have dropped the subject, and respected her wishes.
However, I do agree with your comment made.