Your wives are using you as anchors while they're out looking to build new new relationships. By accepting this behavior from them, you are creating inflated,false sense of power in them.
Your wives may even react to you sometimes in an almost arrogant way (ie. if you meet someone else, you can't bring them to the home, interesting that someone thinks they can dictate policy on your actions while they are moving out and looking to get some lovin' from another man).
They are using your devotion as a good husband as a means to attract someone new, they probably talk to new guys and tell them how heartbroken you guys probably are, and this makes them more more attractive to their lovers/possible future lovers. Your grief over your wive leaving you/separating from you is an an advertisement that they are using to attract someone else.
If your wives were to feel threatened and suspect that you guys started to do the same thing (look for another woman), if they believed that you started to move on, they would probably reach out to you emotionally & sexually and appear very jealous, and try to re-claim you with their actions ("I still love you, do you still love me, let's have sex" & reconnect, etc.) and in most cases it would work, you would be fooled into thinking they were genuine and you would feel encouraged to think that they wanted to come back again.
