Move Past the ABCs.
The old trick of writing the ABCs with your tongue to ferret out what your partner likes is a nice, but problematic, idea. "If you're going through the alphabet and you're trying to figure out what someone likes, by the time you hit 'B' and they're like, I like 'A,' you might not remember [how you did it]," says Katz. Instead, she recommends spelling out words that repeat certain letters and being sure to remember if you're using capitalization and block or script letters. Another technique is envisioning her vulva as the face of a clock and keeping track of what times are her favorites.