They were both English educated.
Da Ma could not understand Chinese at all
while Xiao Ma managed to write some simple sentences.
There lived one lady - a very pretty and sexy Chinese lady
opposite their flat. Both brothers were hungry to "eat" this lady,
but they kept their desire to themselves.
Finally, Da Ma disclosed to Xiao Ma his lustful desire for this lady
and requested Xiao Ma to write this lady a love letter on behalf of himself.
Naturally, Xiao Ma was upset and tried to sabotage his brother.
So Xiao Ma wrote a note and flew it over to the lady:
"Da Ma Bi Jiao Lan" (Da Ma is lazier)
To Xiao Ma's surprise, this did not make the lady disappointed about Da Ma
but instead she so delighted when she saw this note
and immediately hooked herself to Da Ma.
Guess why? Chinese doesn't read sentences from left to right.