When you fish you cast your line into a body of water. To interact you cast yourself into a sea of people; when you are a parent, you cast yourself into a sea of family. You look for somebody familiar, or interesting. You interact with someone you’ve connected with a thousand times before. Or you catch someone new with the glimpse of an eye. You smile, maybe even flirt. You shake hands. You friend them on Facebook. You hug them. You make love to them. So many interactions, so little time.