Just 20 or 30 years ago this would be a taboo topic, the thought that husband wants to share his wife with another man would be scorned on, but it's time to get on with the program and enjoy life while we're still young and while things haven't gone to shit yet! If your husband feels like adventuring, it's not such a big deal, in fact, there's science behind it all, it appears that the mere thought of his wife being with another man can raise sperm count with most men, so wife sharing fetish isn't something to be scared of, after all, it's just a threesome, and it doesn't men anything else then the fact that the couple or a pair wants to find out all that works for them in the bedroom.
Girls and wives, you shouldn't be too shocked if you find out that cuckold action is something that excites your man, and if you want to make him happy and don't actually want to go through with it, just talking about it in details will probably do the trick, but if you feel like doing some adventuring yourself, then go for it. Just make sure you're going for it for all the right reasons, if it's some revenge type reaction then you will probably be disappointed, men who suggest their wives to have a threesome with another men are mostly not affected by jealousy, it's a turn on watching some of the control getting away from him and then knowing that in just a few hours he will be back in control. The fact that he wants to have a threesome does not mean he doesn't love you, it just means he's not as possessive, in fact, studies did show that men whose fantasies get fulfilled are more devoted to their wives and that they are much, much less likely to cheat on their wives.
As for the guys, think twice or even three times before you suggest this to your wife, not every woman wants to hear that her husband wants to share his wife with someone, so make sure that you introduce this idea either gradually or to do it subtly. Do not insist at once, but persistence does pay, especially if you have means of making your wife happy even without turning to different fetishes, content women are much more likely to agree to some adventures in the bedroom.