How does somebody own a girl who’s above 21 years?

It is important to clarify that no one can "own" another person. Every individual, regardless of age or gender, has the right to autonomy, freedom, and self-determination. Ownership implies control and subjugation, which are fundamentally incompatible with modern values of dignity, respect, and equality. If you're referring to relationships, it's essential to establish mutual consent and understanding. Healthy relationships are built on respect, trust, and partnership, rather than concepts of ownership or control. If you have specific questions about relationships or related topics, feel free to share!