An end-user device and method for messaging, includes: enabling an initiating user, using an end-user device, to choose at least one target user and to subsequently press a dedicated button selected from a set of dedicated buttons that includes one or more dedicated buttons; and in response to pressing the dedicated button preceded by choosing the at least one target user, enabling sending to the at least one target user a respective message, wherein a type of the respective message corresponds to the dedicated button, pressed by the initiating user.