The woman has begun to feel that the relationship with her boyfriend is getting serious. The time has come to see if the young male can accept the discipline she would enforce on any man that she married or lived with.
Taking him over her lap she begins a test hand spanking. If he responds properly she will give him a talk about gender roles and his place in any relationship with a dominant woman.
If he rebels against the spanking, she will no longer date him. She can’t waste time on an unacceptable man who does not know his place.