As your baby latches on, her chin should touch your breast first and her upper lip should close around your breast last, ensuring she gets a big mouthful of breast tissue, primarily the lower part of your areola and the breast beneath. (babycenter.com)
He will nurse more efficiently with a big mouthful of breast from underneath. (pregnancy-info.net)
Once he gapes, pull him quickly on to you so he gets a big mouthful of breast. (pregnancy-info.net)