why???

Y will same surname ppl have stupid children??
do u belief?
do u accept it?
or u belief..
becos u rather belief..
than haf a tragic ending..
by having a stupid or retard kid??

is it scientific proven??
i dun know..
if u happen to know..
please tell mi..

well..
i think...
i dun know lah..
hahaha
dun wana think abt it..

anyway.. tis kind of things..
i dun need to bother abt it..
haha..
i m still 18...