Setting relationship expectations

Recently I stumbled across my grandpa’s love letters to my grandma. Yes, this dude actually sat down on a chair (I bet it was a leather chair), dipped his pen in some ink and would write this woman love letters almost every day. Back in the day there was courtship then marriage then sex. Straightforward, no grey area.
Now that sex is a lot more open and women can acceptably (certainly in my opinion) have sex with multiple partners prior to marriage, there have been an expansion of categories of relationships. Here are the four key categories:

1. Booty Call: