Why do girls like to tease or make their boyfriend beg in front of other people?

There are 2 incidents which I wanted to discuss
1. One of my colleagues (let's call her A), we were good friends. Her boyfriend came to the city and we all went to play snooker as it was something we had in common. I saw how she was treating him, like a dog, trying to control him. Teasing him, calling him names I saw that he was embarrassed in front of me and in front of all the people who were playing on other tables.

2. My friend's girlfriend, has an Insta group where she and one of her friends are trying to set up with my other friend.
And she sent an insensitive reel, which offended all my friends and even her friend,
We all joked about it dialing down the tensions. Joking how it made us uncomfortable, but one of my friends tried to push a joke on her just because she was being a jerk. She just broke up with him just because we called out her shit?
Why don't these girls understand that there is a time and place to show dominance. A public place and a friends group is not a place to display your control over your significant other.
I have a complaint about 2 different girls.
But some men are like that as well doing it to women in a more f**ed up way.
Why do girls like to tease or make their boyfriend beg in front of other people?
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