Is 5.6 inches a good size for 18 years old?

by world average you are fairly close to average. the average length of the erect penis is about 5.88 inches (149 millimeters). Don't take any notice of the porn you see these things do not relate to the averages of the real world.

You don't state if this is a erect size or normal if it is a erect size this is a bit short if this is the normal size then this is a good size.

In the last few years, it has become apparent that the average man's penis is not as long as had been thought previously.

many years medical books and articles in the press and in pornographic publications have stated that the average length of thr erect penis around 6.5 inches (165 millimeters).

this has led to a lot of males who are shorter than this to feel inadequate.

the problem with this is though that the average was based on self measurement,

Self-measurement of this sort is notoriously unreliable.

Why? Because so many males don't know where to measure from or use inaccurate rulers or ancient tape measures.

Also, there's probably a tendency for guys to round their 'scores' upwards, in an attempt to make themselves sound better-endowed. And the results tend to be skewed by people who falsely claim to be 10 or 11 inches long.

In recent times, a number of scientists have attempted to obtain more reliable figures, by the simple expedient of employing a trained person to carry out the measurement of each man.

And the results, which they have produced, seem to indicate that the average adult male is considerably shorter than had been thought.

In reality, the mean length of the erect penis appears to be only about 5.88 inches (149 millimeters), which is considerably less than the 'old' measurement.

Does all this matter?

If you're a woman, you probably think that this concern about fractions of an inch is rather silly.

But if you're a man, you will know that such matters are -- somewhat irrationally -- of considerable importance to many males.