while having sex with your partner from behind and pulling your hands away from her hips slowly enough so that she doesn't really notice and then making face goggles with your hands. all the while trying not to laugh or get caught doing it and never telling her you did it
taking one hand off, then the other, then putting them up to your face. make a circle with your thumb and fore finger into a circle, put your middle finger, ring finger and pinkie around your jaw bone and tiwst your arms up to make hand goggles and a mask. all the while trying not to laugh histerically You have then achieved the "Wilke"