usually there's a good reason.

Ive heard of people setting trap texts in their phones (getting a free phone # app and sexting their real phone numbers) just to see if their sig other went through their phones. Never mentioned doing anything but 'talked about doing things'

If the sig other finds the text, they will show it on their behavior, and they are busted.

But it was hard for my pal to get out of that since he deleted the app that the free # was on lol, idiot