Because it would fall over if it lifted the other one.
or
Because an undocumented worker has been living on his head for the past 2 decades!
or
Once you deport Juan you deport Jamal.
or
Only one, but it may take upwards of five years for him to get it done.
or
Slippers.
or
Some day my prints will come.
or
Because he has such yuuuuge fans!
or
In a hambulance.
or