Unfortunately, this is the difficult part. To have an idea what a woman is all about is difficult in itself, but to do so in a manner of minutes, hours and days than months and years is even more difficult. This is where the trial and error comes in. This is where experience comes in. Getting to know the female species is like learning material from a book.
Some men can read that book once and know complete meaning of the material.
Others will have to read the book more than three or four times. Mind you, a woman can be a complex book, which is why so many men struggle. There are men in their 20s who have no idea. There are men who have been married three or four times and still have no idea. There are men who will die tomorrow at the age of 88.