Our son recently discovered his penis. And I do not mean that he did not know that it was there before. Only that he knows that when he brushes against something it feels good. Tuor tells me it is common for boys to be curious of such things and so I am not worried.
I did not wish to embarrass him, and Eru knows he isn't thinking about the sexual act when he does. But it was very surprising to catch him.
We sat him down and spoke to him, of course, and said that it was very okay to do it. If only he does it privately. And that girls do it privately too.
I felt good in being able talk to him, he is very smart. He is growing so quickly. I should like him to remain a child for a hundred years yet.