Studies show bed-sharing can be unsafe. Adult beds usually have soft surfaces, comforters and pillows that can be suffocation hazards. It is not recommended that an infant sleep in an adult bed, waterbed, sofa or chair, either alone, or with other children or adults. If you breastfeed in bed, it is safest to return your baby to a separate sleep surface. Parents who are sleep deprived can be unresponsive to a baby in distress.