Agree with all of CiffRichardsuckseggs posts totally!!
We all have different yardsticks on what we do or do not accept or think is right.....and it is nice to read others opinions because sometimes it can let us look at an issue from another angle.
However, I think it is unfair for anyone (esp on here!) to be judged on their own opinions or on to how they choose to run their relationships.
As for the original query.....my DH wouldn't do that and I wouldn't either. We are not uptight or paranoid or possessive. We just choose to respect each other in ways that suit us both as a couple. It is not a case of any of us being 'allowed' or 'not allowed' to do something. I trust him, he trusts me and that's about it....it's dead simple. For us, (and I asked him his opinion about this), it just doesn't feel right to be heading back for coffee and xmas decoration appraisal in the way that the OP has described... If others do it differently in their relationships, then fine.....each to their own.