For the men, spell out the alphabet on your woman's clit and even spell out her name. For the ladies, do the same with the dick and/or balls. You can blindfold your partner or have them close their eyes while you spell out something and they have to try to guess the word. You have to have some major tongue skills in order to pull this one off though cause I don't think they sell "Hooked on Phonics" for oral sex.