That's how my ex knew I was with a girl behind his back. I didn't have time to shower before he got home and when he kissed me right away he said that he could smell and taste her on me........so much fun it was
i once had sex with a now and then X in my room and forgot the door was open as it was hot, then when i went to the toilet after my brothers door (next to mine) was open as he was hot and he was sat reading a book... somuch for everyone thinking we were being good friends after breaking up