I think it was also because of his giant rant about how he never got a date in real life, and most of the girls he knew were beneath him.
Five reasons why Blalron changed his mind and is now going to the prom:
- he got a date.
- he got a date.
- he got a date.
- he got a date.
- he got a date with a WONDERFUL girl! One who is not at all like those other girls.
Congratulations Blalron, and have a great time. 
I forgot to add. Whatever, enjoy your party.
Glad you have your priorities straight. Go forth and conquer.
Well, off I go tonight. Let’s hope it will be a fun and memorable time.
No mystery here, Blalron, I have a (until next year, hah!) teenage brother. What goes on in his head is a mystery to all.
I’m guessing, though that you changed your mind because you got a date. 
Have fun!
Well, it was all right. I kissed her a couple times but she wasn’t too keen on the idea unfortunately. Dancing was pretty good though.
Congratulations, Blalron. Having been a horny teenaged boy myself not THAT long ago*, I’m glad for you.
[sub]*Holy cow, was my prom really 14 years ago?[/sub]
So is it true going to a Prom costs about the same as a year at Harvard?
Only if you’re attending Harvard’s Prom.
She’ll break your heart- don’t do it Blaron!
It’s amazing how one’s morals and principles crumble in the face (or elsewhere) of attractive young women. Welcome to being a guy!