Wives who swallow

Sean here. In our earlier years of sharing, Jennifer would let men cum in her mouth (she would swallow) or in her face. However, these days she's less inclined to let a man cum in her mouth or face. I guess tastes change in what you like.
In our earlier years? I'm just now finding out about this and charting our own way of swallowing. When did you starting swallowing or getting your load swallowed?
 
Wives can be trained that way, to be obedient. I'm still learning but I've taught some to swallow who didn't before. Seems like a lot of older women aren't used to swallowing so I have to teach them to take my cum in their mouths and enjoy it.
Can we communicate how to make sluts more open? What skills do you have?