First, two related questions touching on the same very important conceptual issue.

Those questions touch on what is happening in Egypt.

The questions touch on topics such as childhood playmate preference.

For him, the question he had in mind merely touched the surface of his greater problem.

Her question had touched at the heart of an issue about which he had strong feelings.

Somehow, his question touched the cause of her distress.

No question but I must have touched his heart at our first interview, so that he has since stood my friend consistently.

And these questions may not touch the most basic issue.

It was as if the question touched a start lever within him.

Because questions often touch on multiple issues, you may notice the same question appearing under several topics.