Surprisingly it makes little difference to me. Up until 2008 most but not all of my sessions ended with one. Since then only a few have ended with an orgasm. I have always left that up to the whims of the mistress and my two favorites in recent years don't want that. There was another who was favorable but that was because she was very much into making slaves eat their cum. The one instance where it made a big difference was with a Domme that I sessioned with many times in 2007-2008. When I was masturbating at the end of my second session I politely asked her to pinch my nipples. She did so eagerly. The next session she eagerly did so without being asked. I made eye contact and it did not bother her. indeed she seemed pleased. It became a very pleasing ritual for both of us.