One or more sensors may detect a gesture or gestures by one or more human users. The detected gesture or gestures may trigger sharing of music or other information. For instance, a first user may be listening to music on headphones. A second user may turn her head, so that her head is facing toward the first user. A sensor may detect this head orientation of the second user. This head orientation may trigger the system to share the first user's music with the second user, for at least as long as this head orientation continues.