Oh? How so?

If I ask my daughter to dinner, she expects I'll pay because I invited her.

If I ask my dad to meet me for coffee, he expects I'll pay because I requested his presence.

If I ask a colleague to join me for break, I'm expected to at least ask if he or she would like anything and either bring it to them or buy it.

If my boss asks me to a working lunch, they're picking up the tap, because I'm being asked to work during my lunch time.

The is common courtesy established over time. It's pretty universal in western culture.

If you request, require, or invite someone to something you are expected to host.

When you ask a woman to a coffee date you are the host.

If she asks you, she is the host.

You are requesting the presence of another person in order to evaluate mate potential and begin courtship. Time has value.

In what universe is that entitlement? That's an exchange of time with being honored, being hosted.

And yes, to host someone is to bestow an honor. A small one, I grant you, but you could have chosen someone else to honor and you didn't.

There are rules people. They're not hard.