Create an email account with friend's name(i.e [email protected]. Find the email address of a lady(or a guy if you really want to be a prick) and begin a courtship via the internet. This will be great to watch when the two see each other face to face. Her thinking he is in love and his poor ass having no idea what is going on. If its a guy you wrote to, you can laugh when your friend gets punched in the nose for what he thinks is no reason at all.
