Peeping on teens and analyzing body language

I'm peeping on this teen couple and their body language is telling me everything I need to know. They are in love and judging by the way she leans on him and arches her back to rest her ass on his crotch, they probably already had sex together. Yes, that certainly isn't the clothes that a virgin girl would wear and it ain't the behavior of one either. She looks sexy when she arches all the way to put her arms around his neck, that is for sure.