It doesn’t matter what kind of modern day dating mantra single people chant, sex changes a situation. Whether you admit it or not, something is happening in the aftermath of an encounter.
It can get frustrating because we don’t always understand the “whys’ and the “whats” that are involved after you are intimate with someone. What do you think changes after sex has been introduced in a dating relationship?
I would say that the primary reason things change for women is the emotional value we assign to it. In a lot of cases, it appears to not match the guy’s level of emotion, which in turn brings on a different set of reaction and behavior.
What happens after you seal the deal? Do you act differently? Do you have a discussion about it? If it is casual only, do you make that clear at that point or before you even take it there?