Once upon a time in China, lived two Chinamen. One named I Cum, and one named No Cum. No Cum marry pretty Chinese girl named No Cum Tu. For velly oblious reason No Cum and No Cum Tu not have any childlen.
One day, No Cum went out of town on business and I Cum came over and spent the night with No Cum Tu. That night I Cum came and No Cum Tu came, too. This make both velly happy.
However, about 7 or 8 months later, No Cum see he about to become father but he not know how come, so when baby come he named it How Cum U Cum. Of course, I Cum and No Cum Tu know How Cum U Cum came, but to this day No Cum not know how How Cum U Cum came!