As an experienced bull here are some tips for the wifes that wants to turn their husband to a cuckold/stag

1- you can open up and tell your husband about your past sexual experiences in detail while you kiss him and shake his dick. This will automatically help him to imagine you with another man. If you feel that your husband won't accept hearing it, you can start the whole thing by asking him about his past experiences then it will automatically make him ok to listen to yours.

2- watch porn together and you can slowly start picking up videos of MFM two males fucking a girl together. Show how turned on you get by it! Shake your husband's dick and kiss him. Tell him that this turns you on and you love it. With months doing this you can start slowly picking soft loving cuckold videos just test the water before you do.

3- start talking dirty in bed and ask him about his fantasies. After you listen carefully and make him feel safe to tell his true fantasies start with the soft fantasies as foreplay then slowly to be shared with another man and him! Make sure to pleasure his dick and be all over him while you say this. Make sure his dick feels so good and show him how you are turned on by it. And if by chance your husband says it as one of his fantasies directly show how turned on you feel about it and love him fit it even more that he's opening up with you! Make sure to make him feel safe that you want only him as a husband/boyfriend and you are so lucky that he likes to experiment.

4-when ever you mention a MFM threesome fantasies and your man Mention a FMF involving another girl in bed with you too directly shut him down and tell him you don't want it and you can never feel good about it. If a threesome is going to happen keep it only open for another man to be involved

5- mentioning the fantasy of being watched by a another man while your man fucks you can help into the idea of the other man joining too! Additional to that, you can tell him out of love that (if you ever decided to share me with another man out of your chosing for fun, I might be down to do it) with a big kiss after it calling him you're man and you are his slut.

6- (addition tip because I'm awesome) always reward him if he ever mention it or makes you cum thinking about threesome with another man or cuckolding! Till him how much lucky you are to have him and how much fun he's making your life! Tell him that doing this makes you bond with him on a deeper level... Rewarding him will only makes him want to do it more

The idea can be introduced with love and seduction that makes it feel natural and loving. Any wife needs help with her husband let me know in private.

Let me know what you think that can help too