The main model of any brain (human or animal) is the Protection and Survival Model (PSM). If something (a person, an animal, an object, an idea...) is included by a person in his/her PSM (as a model, of course), the relation between that "something" and that person is a love relation. That is, e.g. a person A includes a person B (as model) in his/her PSM. The person A will treat person B in the same way as he/she treats his/her legs, hands, eyes etc. Here we use the convention that A indicates the person who is in love and B is the person included in the PSM as a model. The most important love-relation seems to be between a mother and her children. As we defined the term "love" the fact that A loves B is totally independent on the fact that B loves A. We already described love based on PSM. There is another type of love, which is not based on PSM. Thus, the person A makes a structure of models which contains B in about all of them. If B disappears, the models would become obsolete, which produces a large instability of the structure. The problem could be solved by another "B" or by a shielding model or by suicide. Because love is based mainly on image models, about all of the written above is true for animals too. 13. Happiness, to be happy MDT considers that there are two basic modes of interaction of the brain with the external reality: to generate the reality based on the external reality and to modify the external reality. Continuous happiness is associated to the status of the brain which builds action models (ZAMs) based on ZMs-only. That is, to do and want only what is possible (as ZMs predict). So any activation of a ZAM is a success (ZAM is able to reach its aims). The happy persons have a big contribution to the stability of the society, but small contribution to its advance. We already defined the disharmonic person as the person who builds and activates ZAMs without taking in account too much the predictions of the ZMs. Usually such persons are unhappy, but sometimes they are able to reach their aims and so, at least for a short time, they are in a status of high level happiness. 14. Intuition Based on MDT, intuition is associated to the capacity to obtain image information in a symbolic frame. That is, when we are in the frame of a symbolic model and there is a problem without a solution, an image model can be activated automatically on its own (as we already know). Such image model is able to make a prediction but there is no proof or reason for it (because an image model generates image-truths!). There is just a feeling that such information is true. The symbolic model can use this information to solve its problems. In this case, we speak about intuition.