Before engaging in intercourse, you prepare by shaving your pubic hair. Without her knowing, you hold your shaved pubes in your hand. While doing doggie-style, you pull out right before climax, and spit on her back (houdini). She'll turn around think you're done, then you cum in her face and throw the excess pubic hair in her face (making her look like chewbacca) and scream with a loud chewbacca roar!!
Wasn't my rendition of the Chewbacca spot on last night honey!?