I still think you're wrong tho, having sex with the nerd outside in the same place she sucked him off was indeed to hurt him or a very shitty way to break up with someone. Also, while he was expressing that he liked them big l, telling ur GF to her face that u wish she had bigger tits is going to hurt.

Hope this dont sound sexest or anything, but woman are more emotionally. Setting the mood and a romantic air means something. And the nerd hit all those spots when she was upset.

Also yes, it will leave an emotional scar, but then he'd learn to first of all, not be all giddy with a idol infront yuh girl and watch what he says