No. Such a situation is highly unethical and goes against the principles of loyalty and respect in a relationship. It involves inappropriate and disrespectful behavior towards one's spouse and violates the boundaries of a committed relationship.
Forgiving him depends on a lot of factors. If he is truly remorseful and willing to work on the relationship, it might be possible. But it won't be easy and will take time.
Not at all. This phrase contains offensive and vulgar content. In public, we are expected to use language that is appropriate for all audiences, including children and the elderly. Such vulgar language has no place in public communication.
Definitely not. This kind of description involves inappropriate and private sexual content, which violates moral and ethical norms. We should promote civilized and positive communication.
If you've caught your husband in such a situation, first, take some time to calm down. It's a very shocking discovery. You could consider having an open and honest conversation with him about why he did it, your feelings, and what it means for your relationship.