In a relationship, trust is the utmost important factor. Anything else without trust crumbles.
Insecure people are very difficult to deal with and they are also frustrating as they project their fears unto their partners for no reason.
I agree with you, if your conscience is clear, then there's nothing to hide.
I don't allow people touch my phone except I expressly allow it and this is because I have suffered a lot of setbacks from allowing people have free access to my phone. One of them deleted an important file on my phone. I could not recover that fake again.
Yes, that's the reason I don't like releasing my phone, especially to someone who can't handle it. Imagine giving your phone to someone and then accidentally deletes an important file? That will be bad.
Yes it really was a bad experience for me then.