Starting a wife picture trading group with friends

Some of my close friends and I have some pretty sexy wives. How could I approach them to see if any of them would be up with sharing a monthly picture of our wives with each other. Each month one of could pick the picture theme and on a set day of the month we could all share the picture with each other on a group text. Does anyone else do anything like this with their friends? How do I jokingly suggest it in case the response is negative? Any ideas would be appreciated

First, think whom might be likely to join you.

Once you ask or put the subject on the table, you're there without your panties.

My suggestion. Find out who of your friends takes as well pictures of their wives. Then ***** it over and mention the subject again by complementing his wife's look, if he would mind to show you some of those pictures. Then show yours and you start sharing.

As you have a pretty sexy wife and I am curious to see her. Share some pictures of her with me. A trusted stranger. That will allow you to get hard.
it might be painful

If it's the same guys that your wife cooked breakfast for that time with her ass cheeks and pussy on show when she bent over, then I'm sure they'll be up for seeing photos of her and showing you their wives too. I'm surprised one of them hasn't fucked her yet.
Peter C