It is not appropriate at all. This kind of story belongs to the realm of inappropriate and private behavior. In a civilized society, we should focus on positive, respectful and ethical topics.
First, it is disrespectful to others. Everyone has the right to privacy. Second, it is against moral and ethical standards. We should promote positive and healthy content.
Rather than discussing this kind of potentially vulgar topic, we could talk about the first time a man tries a new sport, say surfing. The feeling of standing on the board for the first time, the rush of the waves, and the sense of accomplishment are great things to share.
Sharing this kind of story is not acceptable. Intimacy within a marriage is a private matter. It violates the privacy and respect that should be maintained in a relationship and in society in general.
Rather than exploring this inappropriate topic, we could talk about positive relationship stories like how two people build a healthy and loving relationship.
No, it's not okay. Such a story contains explicit sexual details which are not acceptable in most social and moral contexts. We should respect the boundaries of appropriate communication and not disclose such personal and inappropriate sexual experiences.
Sharing such a story is highly inappropriate. It involves very private and often sexual content that should be kept confidential. It also violates the privacy and dignity of others involved, not to mention it goes against good taste and ethical standards in public or private communication.