It's yuck to have a married friend. Married people make pacts between them and they affect you, the friend, negatively.
Examples:
1. Lucy and John, my ex friends. She boycotted McDonalds for him in exchange for his agreement to not having their child's hair cut. We were very hungry, there was only a McDonald's where we were, so we had to shorten our visit and eave to another place to eat.
2. Lou stopped running after his codependent, alcoholic mother. In exchange, his wife Sharon stopped involvement with her very ill mother. Result: her sister has all the burden of helping their sick mother.
I suppose married people should only have married friends, so that they can honor each other's pacts and not get disgusted by the whole thing. I just can't stand having to honor my friends' pacts with their spouses.
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So-called white lies are like fake jewelry. Adorn yourself with them if you must, but expect to look cheap to a connoisseur.