ideas on how to write a prenup?

bae and I are signing marriage papers before we announce the baby, and he told me to think of some things I wanna put down on paper. m

I have no ideaaaaaaaaaaaawhaaaat?!?!?!

what do I write what do I not write where do I write how do I write how long do I write?

any ideas please? not even sure if this is something you ask for ideas for but i’m clueless as hell