Me and my friend Joe were discussing personality types a few days ago, about how INTJ people like to analyse and profile people, as you have guessed it I am an INTJ as well. I found this nice ability that lets me estimate to almost a week accuracy when a couple that look perfectly happy together, will break up.
Usually there are 5 stages of an incompatible relationships the length of each stage is dependent how smart the potential breaker will be, how early he/she will notice the incompatibility even with the initial NRE(New Relationship Energy).
Stage 1: The NRE. the other is amazing, perfect partner, everything about them is cute, amazing, lovely, hot, sexy. At the end of this stage, the breaker would start noticing some incompatibilities but they will usually ignore them: its fine, we do not need perfectly alike, opposites attract after all.Basically deluding themselves.
Stage 2: The others. After an initial stage the couple will start seeing friends again at a most recurrent pace, not like first period when only the two go out on dates and basically fuck each others brain out. Friends will start measuring up together, and in a while they will notice the incompatibilities better than the couple. Specially if there is a big personality difference, like if the girl is fun, sweet, highly sociable one and the guy is a quiet, barely talking , guy who sits in the corner not talking at all(the friends of the female will notice the incompatibility, the friends of the male would think that the girl is amazing). The friends of the female usually start probing around with “innocent” questions, but in fact they would be trying to show the girl that they are incompatible in an indirect way. At this stage, on the outside everything looks like normal, on the inside, the breaker would start thinking more with the head and not with the genitals, but still they deny their feelings as stupid and the other person is just amazing, and they are just being silly even thinking about that.
Stage 3: Fun without the other. At this stage, the couple start to have an alone time, they start having guys only night outs, girls only night outs, just to be back in the normal life. They miss their lives after all, they miss the crazy things that they do with the gang.(there is a problem here if either is not in their usual environment and the only friends they have, are the friends of the other person). At this stage, they both start oggling others “innocently”. At the first two stages, even the horniest men, wouldnt even bother looking at other girls, no matter how hot they are.
Stage 4: The decline. The breaker specially will start noticing that they miss a lot there old selves, the type of fun that they used to do, and they do not do anymore. At this stage, the breaker will start becoming quieter, the other person will start noticing something wrong, the breaker usually blames it on something else: work, other friend, pms or what ever.
Stage 5: The break up. It starts by started going out more and more alone to do the stuff that the breaker loved to do. Until one day they find another person who they share much more in common that their current lover.at this stage the break up is in a matter of around 10% of the time that they spent together in total.(10% is a vague estimate on observations alone, no sources to back it up). Thought the person that started the break up, will rarely be the new lover. They would instead just be friends.