I want to know how I can post on this forum about finding mine and Daddy’s third and fourth?

What does that mean?

Hello Halfpint76,
Try this link:
http://www.polyamory.com/forum/newthread.php?do=newthread&f=4
The link will allow you to start a new thread in Poly Relationships Corner.

Also you can navigate to any board, and there will be a button in the top left corner that says "New Thread." Click on that button and you can start a new thread in that board.

I hope that helps.
Regards,
Kevin T.