Back in college I was in a male dominated major with a pretty small group where everyone knew each other. There was this one girl who was kind of cute and was a pretty big flirt/slut. She would often dress kind of provocatively and loved the attention.
One cold day in mid November she walked into class late(as normal) wearing like a sweater dress thing that was super tight and showed a hell of a lot of leg. One guy I knew leaned over to me and whispered "Awfully slutty for November". The professor was in a pause in his speech and he said it louder than he meant to and everyone in the class heard it. The girl turned beat red and I don't know if I have ever laughed so hard in my life.
Probably one of those had to be there things. Pics of similar dress below.