I'm not sure whether the guy is actually out shopping with his wife, putting on a good face but secretly wishing he could be alone at home and not deal with it, or if it's actually about a lonely man who fantasizes about all the mundane stuff that comes with a relationship, he's so desperate NOT to be alone at home. The bridge seems to imply more toward the former, and that maybe the reason he is "alone at home" in his mind is out of embarassment and fear of being seen as a "weak" husband, following his wife around on errands.
I'm not sure whether the guy is actually out shopping with his wife, putting on a good face but secretly wishing he could be alone at home and not deal with it, or if it's actually about a lonely man who fantasizes about all the mundane stuff that comes with a relationship, he's so desperate NOT to be alone at home. The bridge seems to imply more toward the former, and that maybe the reason he is "alone at home" in his mind is out of embarassment and fear of being seen as a "weak" husband, following his wife around on errands.