Avoid engaging in it. Just walk away or change the topic.
No. It is not only inappropriate but also may make others uncomfortable. There are boundaries in communication, and this clearly crosses those boundaries.
Politely tell them that this is not an appropriate topic for discussion.
No. Such a topic involves very private and inappropriate content for public conversation.
This is a rather uncomfortable situation. First, you could try to have an open and honest conversation with her in a gentle way. Ask her why she's doing it and express how it makes you feel.
You should have an open and honest conversation with her. Discuss your feelings and any potential risks. You might also want to do some research together on the proper way to do it safely. If you're not comfortable, be clear about that. It's all about mutual respect in a relationship. You could also suggest alternative ways to maintain hygiene if you're not into the shaving idea.
If you hear such an inappropriate story, you should firmly distance yourself from it and let the person know that this kind of content is unacceptable.
One should firmly reject it and distance oneself from the source of such stories. It is important to uphold one's own moral standards.
First, don't overreact. Just approach her casually and ask her about it in a non - judgmental way. For example, you could say 'Honey, I noticed something different. Is there a reason?'.
First of all, this is a very awkward and difficult situation. If it was an accidental sight, you may need to have a calm conversation with your wife about how she feels. And if it was inappropriate behavior from someone else, you should consider taking appropriate actions to protect your wife's feelings and rights, such as having a serious talk with the person involved or even seeking legal advice in extreme cases.
If you hear such a story, the first thing is not to spread it further as it is inappropriate and offensive. You could also encourage the person who told it to stop sharing such immoral content.