It happened to a friend of mine. We were all on vaction (about 7 friends) and everybody was drinking. We were the only two who didnt. He managed to snag his girlfriend's phone while she was passed out and pulled me to the side. He said "she's cheating on me, some guy named joey texting her and meeting her after work for sex everyday. Plus how he can make her extra wet." We ended up searching names and mural friends via facebook. Turned out joey was a girl.