Neither knows how to talk on the telephone. Neither understands what you see in cats. Men only have two feet to track in mud. Men can buy you presents. 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 eat cat turds on the sly. Men open their own cans. Dogs have dog breath all the time. Men can do math stuff. Holiday Inns accept men.