The Perfect Lawn

Being an avid lawn nut, I refuse to permit weeds
in my perfect lawn, and use herbicides each week.
One night, a party guest was walking along the
property line with my daughter. Seeing a sea of
clover on my neighbour's lawn, she noticed it
came-up to my lawn and stopped. She asked my
daughter why the clover didn't cross-over onto
my lawn.

My daughter furrowed her brow, looked at the
guest evenly and replied, "It wouldn't dare !"