In the bathroom of the school, i was 17, a girl was discussing with her boyfriend, she was very angry with him, I heard her saying to her boyfriend "now I suck cock at the first guy who passes!" And then I came in! I think I was more astonished than that guy! (and i think wasn't for my measures) I looked at him while she put my cock in her mouth and i said "c'est la vie!"
No matter i had to piss! The guy was there until she finished and after they continue her discussion. I said thanks and go back to my class, with a smile!