Off the top of my head, the bed scene and the dress scene come to mind.

Watch the European version, Leon: The Professional, it has different scenes and editing from the American version, The Professional. In Luc Besson's original cut, there are some very overt examples of, let's say, inappropriate interactions between a grown man and a child. Even moreso in his original script that didn't make the cut (thank fuck for that).

Luc Besson is a pedo, if that helps explain it.