No, it is not appropriate at all. Such topics are very private and often fall into the realm of vulgar and inappropriate content that should not be shared publicly.
Definitely not. Common phrases are those that are widely used and easily understood by most English speakers. This phrase is so unclear and jumbled - looking that it can't be considered common. It seems more like a very specific or even made - up phrase by someone for a particular, perhaps very private or idiosyncratic, reason.
No. Such stories involve private and inappropriate content. In a healthy relationship, respect and privacy are crucial. Sharing such intimate and improper details is disrespectful to the partner and violates the boundaries of a proper relationship.
Well, if this is a story someone has shared privately or within a certain community, it might involve the experiences of a big - beautiful - woman (bbw) wife in relation to a first - time anal experience. But again, without details it's just speculation.
This phrase is quite ambiguous. 'Anal' could be misspelled or used in an ungrammatical way. 'Tight' might describe a characteristic, perhaps in a relationship context. 'Wife' is clear, and 'first story' could imply the initial account or tale. But overall, without additional details, it's difficult to give a more precise meaning.