spicing up marriage with fantasy fulfillment?

My S/O and I have had our fair share of relationship problems, but things are getting better . We decided to be more open with each other and spice things up. We'll I'm currently 28 weeks pregnant so not much different is happening in the bedroom atm due to trying to manover around my belly lol.

My S/O brought up a idea and I have no idea where to start. He wants to make a list without holding anything back sexually to fulfill our fantasies after our daughter is born and I'm heald and comfortable with my body again. Granite we will compare list and compromise on what we're comfortable with and only fulfill 1 fantasy on the list every few months or so.

I literally have no idea where to start with this list! We have had a 3 sum & a 4 sum with another couple prior to marriage, but now I'm just like OK where do I start....

Has anyone tried to do something similar in their marriage/relationship and this has been successful ? Where would you start with a fantasy list like this?

I guess in a way I'm pretty vanilla sexually after a 3 sum and a 4 sum with another couple, but I've never actually thought about anything fantasy wise & fulfilling it after those pre marriage adventures.