When other people use your iPhone; do you get anxious?
Use Guided Access to limit access to apps and reduce anxiety
I use this feature all the time when my kids want to use my iPhone for FaceTime or some other app. They have a tendency to spend about three seconds in the app that they wanted to use and then start to push buttons. Usually ending up with a random phone call to one of the many people in my contacts.
Use Guided Access to limit access. It's very handy! Locks the visitor into one app and you can disable buttons. Once you start to use it; you'll use it all the time.