When a man returns home after being away on a business trip for a few days, his wife tells him that the dog really missed him.
"She spent every night at the front door, awaiting your return," she says.
"What an example of true love," replies the husband. "I wonder if you would be that concerned about me?"
"Sweetheart," she answers, "if you were gone overnight, and I had no idea where you were, you can be sure I'd be waiting for you at the front door."