I found it!

For years a scene from a TV show has been haunting me and today I found it. In the scene a girl tells another girl that the alphabet should be …OPRSTUVWQXYZ because then “P would come right after R which would be so sexy!” I had that sentence and that scene stuck in my mind for years and years and I just couldn’t remember where I saw it. 

The Answer: Felicity, Season 1, Episode 2, minute 6:11-6:39.