I might sound crazy but what’s the point in lying about something so small like going to a store?

Lying has always been a major deal for me, even with friends. I just don’t see the point in it. If you’re gonna lie to me, I’d rather you not speak to me at all. That might be heightened now that I’m pregnant though... and if so why would you lie to someone to just turn around and tell them 10 minutes later?