Yes please!
Thanks for all the input. I appreciate all the different viewpoints.
ImO it is perfectly the same advice for Women as it is for men. If you want to get your partner consenting to a lifestyle like this, first make him/Her feel that you love him/Her so much, you would not leave him/Her for anything in this world. It is a trust-builder.
Once you have that relationship, you can go on with exchanging sexual fantasies and see what suits both of you. In any case you would start with role-playing different fantasy situations before you perhaps make it happen for real.
A starter could be to include toys in your sexual play as a couple. There are vibrators that can be worn around the base of his penis and would touch your clit each time he is fully inside you. That would be a toy where both of you benefit from its stimulation. You could use an anal plug while he is fucking you. - Again something that makes both of you benefit, as it adds to vaginal friction. (At the same time it is also somehow simulating a DP situation.
)
Once he is used to toys in your sex life, you can start using more "obvious" ones like a black or brown penis-like dildo. It is better when it's not huge but only a bit bigger than your husband, for two reasons. First, it will be better accepted by the husband, and second, a really huge dick is hard to find in real life. (Don't buy that BBC myth - you'll only be disappointed.)
If you are clever enough, like most Women are, you will even find a way to make him bring up the topic first, in the belief it was his own idea.
But no matter what you do, make him feel secure, safe and sound in your relationship/marriage FIRST!