Are both parties equal in a relationship?

If you get into a relationship or marriage with someone:-

1. Taller than you - means you are shorter.
2. Stronger than you - means you are weaker.
3. More educated than you - means you're less educated
4. Wealthier than you - means you are less wealthy.
5. move into my home or where rent is paid by only myself - means you're living for free.

Then is there any case or obligation that I have to treat you with equality?

Are both parties equal in a relationship?
Post Opinion