I'm really careful with my text messaging. I've read my...

I'm really careful with my text messaging. I've read my friends text messages that are embarrassing though. Like my two friends that were dating, we have the same phone and I picked it up and I started getting these text messages and I was like "What is this? What is this?" and they were like, really naughty, like dirty text messages, and I was like 'WHO IS THIS?'