<p>Yes. It's especially difficult for students who are good at what they're doing and truly want to help as a teacher would but don't know how or where to draw the line. They need you to help them draw it, probably. They aren't all natural teachers (as my son was/is), so they can't easily tell what the caller needs and give a little help and then move on. </p>
<p>I don't know what the answer is. There probably isn't one that fits all situations except to back away from it when it's a last-minute call. Maybe he really needs you to tell him that giving help beyond a degree is as much cheating as taking it. Getting that ruling from you could make it easier for him to be comfortable saying no.</p>