Our 18-week-old foster child has been with us since she was five weeks old. Since her mother got out of rehab two weeks ago, she has begun seeing her mother once a week for an hour. Now the baby has started something odd — and this happens only with me. When settling down for sleep, she puts her head on my shoulder, then turns to snuggle up under my jaw. Then she’ll work her way up my face and open her mouth in an O shape, suctioning herself to the side of my face. This usually happens two or three times before she goes to sleep. Is this odd?