One of my pekins does that as well. She gets right up by the door and as soon as I open it she wants to be pet and she flattens out her back and her tail goes up. If another duck comes up and gets attention she steps closer to me. She's sweet. Sometimes I wonder if I should get a drake so they could have their biological needs met, but I know that possibly creates its own set of problems, and they're all pretty happy right now.