Little Wang Dang and Big Hung Lo were discussing lessons taught to them by grandfather.

“My reflexes are such that you will not believe,” boasted Little Wang Dan…drawing his sword, he sliced at a passing fly, which promptly dropped dead in two pieces.

“That is nothing,” said Big Hung Lo…then drawing his sword, he made two quick cuts at another passing fly.

Little Wang Dang was highly amused. “HA HA HA” he laughed. “That fly is still flying.”

“Ah yes,” replied Big Hung Lo, “but now it can never have children.”