Mark 5 tells the story of a woman, desperate for healing, that reached out in a crowd and touched Jesus.  At the moment she did, Jesus realized he had been touched and asked who did it.  The disciples' response is priceless.  They said, "Look at this crowd pressing around you.  How can you ask, 'Who touched me?'"  A lot of people were walking with Jesus, bumping into him, touching him accidentally, but only one intentionally touched him, and in turn, was touched by him.