<human>: Can you provide a brief rundown of the text in within 3 sentences?

EDIT: before you read...it's all about being sleazy. I donno what 80's prom has to do with sleazy but thats how we rollin. Just want some idea's thats all.

So at uni this week we have 80's prom for one of the parties. Each male dormie gets assigned a girl, without the girl knowing who they've got. All week the guys are supposed to give them things anonymously. CSU's (Bathurst Uni in Sydney Aus) tradition is to freak the girl out as much as possible. I'm going for the more heinous approach.

On the first day I drew a warped picture of me wanking, lactating and shitting. It said "I promise to clean the sheets after 80's prom".
Today I shooped a pic of her I got off Facebook, adding a giant cock. It was pretty typical of something to come off 4chan, but most kids here haven't seen something like that...so they think it was quite creative.

Thing is I need to up myself even more. I can't think of what to do next that is even more grotesque and offensive. What do you guys think I could put at her door tomorrow that will up the ante?
<bot>: a week of giving vile pictures anonymously to my assigned prom date. Need idea of what to put by her door next that will be truly mortifying!