Men have twenty one digits

Men have twenty one digits 
I've counted them all 
and let me tell you how to
find them 

The first ten digits 
can be found on the hands 
five for each hand 

The second ten digits 
are of course on the feet 
again five for each feet 

The last digit is by itself 
hanging from balls 
in between hips 

It does not help 
with holding things 
like the ones on the hands 

It does not help with walking 
like the one on the feet 

It only hangs 
from two oddballs 
and does nothing 

It has no reason to exist 
other than to be a marker 
to give men a reason to be 
men 

So don’t ever wonder 
why most men have 
an ego 

they only have an extra digit