No. It is not only inappropriate but also may make others uncomfortable. There are boundaries in communication, and this clearly crosses those boundaries.
No. Spying is generally not ethical. In relationships, trust is fundamental. If you suspect something wrong between your wife and your friend, it's better to communicate openly rather than spying. For example, in most healthy relationships, talking it out clears misunderstandings.
No, it's not considered normal in a typical relationship. Looking at someone's private parts in this way is inappropriate behavior. There should be respect for personal privacy in a marriage.
This is a rather personal matter within a marriage. In a relationship based on strong communication and respect, such an act might be acceptable. It could be part of the couple's unique way of expressing closeness. However, from a health perspective, there are things to be cautious about. For example, using a clean and sharp razor to avoid cuts and infections. Also, it's essential to communicate any discomfort or concerns during the process.
A healthy relationship between your friend and your wife should be based on respect and appropriate boundaries. For example, they can share common interests like a love for books or gardening. This kind of friendship can be positive for everyone involved as long as it stays within the bounds of propriety.
Well, this sounds like a very tricky situation. If by 'knocked up' you mean in trouble or facing a difficult time, perhaps your wife and friend got involved in some sort of project or plan that went awry. It could be a business idea that failed and now they are in a mess. In such a case, you need to be the mediator and find solutions rather than jumping to conclusions.