Men don't have to play with every man they see when you take them around the block. Men are a little bit more subtle. Men don't hike their leg to pee on every post they pass. Men don't eat turds on the sly. Dogs have dog breath all the time.
Men can do math.
Men don't shed as much, and if they do, they hide it. It's fun to dry off a wet man. You have a kiddie wading pool in the yard but no small children. Lint wheels are on your shopping list each week. The trash basket is more or less permanently installed in the kitchen sink to keep the dog out of it while you are at work.