bare (one's) breast

1. To expose oneself in a vulnerable or unguarded position, especially to that which may cause harm or distress. I bare my breast to you, so do as you will. I am at your mercy! He bared his breast to the armed guards to show that he was not a threat. The man had already bared his breast to you! Why did you apprehend him?

2. To share with another person one's private emotions and thoughts, especially those that are emotionally troubling or make oneself vulnerable to the other person in some way. I bared my breast to Samantha and told her how much I loved her. I don't know Adam that well, so I was surprised that he bared his breast to me. Susie's a very private person—she won't bare her breast to just anyone.