I dont think there is anything instinctual about this, but no doubt it feels like it because you've been doing it for so long that it resembles something that is second nature to you.
This has nothing to do with our innate predispositions, it is merely habits inculcated by consistent repitition.
People who first came up with the idea of 'talking to god', were mostly INJs who entertained powerful intuitions just like our modern day prophets along the lines of Nietzsche and Dostoevsky.
3000 years ago when men were uncouth and bewildered they interpreted everything anthropomorphically. Much analogously to how children tend to think the world revolves around them. The more primitive our thinking is, the more likely we are to think anthropomorphically. Hence, INJs of 3000 years back perceived their powerful intuitions as a person who resembled their father figure or God.
Yet Nietzsche and Dostoevsky were realists enough to understand that what they had going on was no more than a powerful connection to the realm of abstract thought. Had they lived several thousand years back, no doubt they would have had intricate mythological characters representing their ideas that we'd be reading in our gospels today. Whoever does the best job of appealing to the tastes and prejudices of the common folk will be the most influential visionary. So, it is no surprise that prophets who spoke about how God shared all the tastes and prejudices of the conventional man of their community were hailed as geniuses.
God is to be thought of as a metaphor for the greatest possible good in the universe. Such a notion could only be abstract and can not manifest itself in concrete terms, therefore direct revelation is not possible. The best that we have is the attempts of prophets to translate their connection with the infinite realm into concrete terms. Prayer, if aimed at the proper ingredients of profound thought may link you to the infinite realm, but in most cases it doesnt because people have toned down the idea of 'god' too much. You need to be in tune with the abstract as much as possible in order to reach the infinite realm, yet god has been turned into something very concrete. Hence, people do not worship god ( using their unconscious mind to intuitively grasp the infinite essence, or the greatest good of the universe), but merely worshipping the convention. Thinking that it is the concrete picturizations of god from the Bible that comprise the greatest good that there is, and that virtue is no more than doing the concretely expressed good deeds spoken off in the Bible, and not some amorphous force that could be grasped only intuitively through the unconscious mind that shall transform you from within.
So, in the end what we have is the following; prophets may have accessed god with their powerful imaginations through the unconscious and this transformed them from within. They described their experiences to other highly intuitive people, and it worked, they followed them on their words and were able to use their imagination to access the infinite realm that the previous prophets spoke off. So, they figured, why cant everybody do this, only if they could understand the teaching, they'd also be transformed from within just like we were. Okay, so lets make the story as simplistic as possible, just to ensure that absolutely everybody gets it, and then they will imagine the vision that we had and it will appeal to their unconscious and they shall be reborn!
No...not to be.. the sensors could not see past the symbols and did not receive the true message by envisioning the vision the prophets intended to convey. They thought that there were literal sheep and goats and literal shepherds and a literal king on the throne who physically throws you into the lake of fire or speaks to you directly like a human being without even attempting to grasp the message that underlies all of this.
Anyhow,everyone, that is my take on god and 'talking to god', hope this helps.