I think part of this, which has been an issue with my wife, is that she felt like things I talked about doing were "weird / not things normal people do" but as she's found out some of her friends have done stuff, it has helped to normalize it and make her more receptive.
As far as whether that helps, I think it depends on whether they have a deep down interest or not. Like, in your example, your wife hasn't been influenced to do ...... because that's just not something she has any personal desire to explore. Conversely, my wife has finally admitted the idea of sex with multiple really turns her on... so it's just a matter of getting over the weirdness and influential friends definitely help with that. She has one friend who is definitely helping to pull her in that direction but they haven't been able to get out that much recently and often a 3rd goes with them, who is pretty vanilla and puts a bit of a damper on what might happen. Self confidence is another big issue... She gets hit on all the time but somehow is insecure about her body and doesn't think anyone would want to see it.