gordie1 - I disagree entirely.
What is obviously seen as harmless fun by this man - although not by a lot of other people, is a world away from child abuse, and to interperet it as such is to seriously over-react in my view.
This is an issue about appropriate behaviour, and the differences in that concept between families.
For example - I grew up in a household where seeing each other naked was completely acceptable. My sisters and i would tjhink nothing of using the bath or toilet while another member of the family was in the room - it was simply accepted as the way it was.
On meeting my wife, I found her family to be the total opposite, and obviously adjusted my behaviour to fit in with hers, since that was the easier adjustment to make.
This is a similar example of those differences. in the grandfather's experience, playing with a child's penis in a jokey way is just that, with nothing sinister intended or implied, and if the father is not happy with it, then a conversation needs to be had, ideally between his wife and her dad.
That is a world away from involving authorities, which is often a genie which cannot be returnd to tbe bottle, and can lead to all sorts of far-reachin consequences which are utterly inapporpriate in a circumstance like this.