For Nipple%, you'll know you're almost there once you get to the Teacher's Lounge, the blue room with a vending machine and two exits on either side. After you get through Tauriel's dialog, you have to turn into the room on the right, which is the cafeteria, and from here you just have to go down and talk to the black cat, and they should ask what it's like to have two nipples after about two speech boxes. Again you do have to finish the conversation to complete the run.