Sweet you have a guy friend so this should be easy for him...
If he follows my intsructions exactly i think you'll get the result you are looking for. This prank which i am poud to have concocted myself is known as Hershey's Chocolate Milk.
Enjoy...
THE Hersheys Chocolate Milk....
This one takes a while but it's worth it! You need to first go to your state house and apply for a name change. This may involve a certain amount for background checks and things of that nature, hope your not a felon. You need to get you full legal name changed to Hershey Herhey Hershey, this is very key. You than need to apply for an international passport under the name of Hershey Hershey Hershey. This will also require a background check so, again I hope you have a clean record, and some time. This next step is also key and is getting towards the end so stick with me. You need to become some sort of hero, save a local orphanage from a fire (you may need to start this fire). This will allow you to get a large front page story with your picture and name, again it is now Hershey Hershey Hershey. Now for the best part! Get this girl in bed, maybe more than a few times, you need to build this broads trust up! Ok this is it, after setting up a closed circuit television system linked to A. an internet web feed, and B. Some sort of recording device( tivo would be fine i think)... you need to have ANAL SEX with her this is huge i repeat it must be ANAL SEX. Work that shit like never before and make sure not to service yourself for a week or so ahead of time so you'll come mega hard! Now release your man juice into her stink hole, deep... now punch that slut in the head and knock her out quick!!! In her placid state her anus will release a creamy brownish off white goo, much like that of a Hershys brand chocolate milk. Take a glass and fill it with said goo. WAke her up and have her drink it, She won't remember much and will be glad to have a refreshment to releave her from such a groggy state. take a picture NOW!!! You must be holding your passport and the recently taken hero newspaper article. Humiliation complete. I'm glad to have been of service my fellow NS'er.