http://www.erotic-lactation.net/milking-boobs/work-those-hard-nipples/ Refers to breastfeeding or breast milking. Mutual breastfeeding is a sign of affection in lesbian partnerships, and other couples will use breast pumps for their boobie milking experiences Wed, 07 Jan 2009 11:22:43 +0000 http://wordpress.org/?v=2.5.1