Nothing Would Be Finer(Slinger)

Achievement Unlocked: Nothing Would be Finer

Have a sixty-nine with a girl for the first time! Were you equally satisfied? Knowing you, I’d guess not.
 * +2 Libido
 * +½ inch dick size

Reference
Unlocked in  Chapter 30 "Sleep Melodies and Creepy Witches"(Slinger)