Ah. I think not. I'd have to agree it helps, but I can't say that would be the only qualifier. You know the old saying 'Pictures are worth a thousand words'? Visuals create ideas inside of our minds. They capture the essence of the moment and, well, stimulate endorphins and permeate desire. If it were all about having great sex, then why would we need to read about it? I think written sex scenes are descriptions of how we'd certainly want it to be. Always sizzling hot sensations that go on and on. A mate who never disappoints, who knows all those hot spots, and never EVER fails to explore them.