You pick up a girl at a bar and are lucky enough to take her home. You are however embarrassed by the small size of your penis and promptly switch the light off when things get funky in the bedroom. When you are about to have sex you reach for a dildo and proceed to pleasure the girl with it like it is your own penis. The girl is none the wiser and afterward thinks you have both stamina and a large wang.
Last night I perfomed a munich, she was none the wiser.