What are causes of musturbation in young boys?

Not sure about musturbation, but young boys usually masturbate because it feels great! Many youngsters (both male & female) discover the intense pleasure of orgasm accidentally, while exploring their bodies in private. It is perfectly normal for boys (and girls) as young as 5 or even younger to masturbate to orgasm. There is usually nothing sexual about it. They simply know that it feels really, really good.