This reminds me of this episode where he tries to befriend a colleague. He meets him in the cafeteria and proposes that they become friends. He goes to a book store to purchase a book on the theories in the field of friend making. After reading the book he designs a flowchart to accomplish his task. Later he leaves a message for him on his phone -
"Berry, it was pleasant seeing you today in the cafeteria. I saw that you purchased the chef salad. I hope you enjoyed it. I'm following up on our pending friendship and I look forward to hearing from you regarding its status."
At the end the entire endeavor results in an exercise in futility. It's a hillarious attempt from Sheldon's side though and a must watch. And I really like the way they name the episodes like this particular episode is named - the Friendship Algorithm. LOL!Check out this link -
http://www.youtube.com/watch?v=k0xgjUhEG3U