I don't feel any need to "leave milk" behind after my baby turns 12 months, however I have it it mind that keeping 1 pump during my workday will allow me to continue a nice little supply to keep up nursing outside of work hours, including before a mid-day nap on the weekends.
However, ever since my son turned around 8 months, my coworkers in my small office started saying "STILL expressing milk???" when they see me going to pump.
With the recent Time Magazine Cover sparking office discussion, I've heard many remarks about how kids should not nurse after they [have teeth, have solids, walk, this that and the other thing]
I don't want to fold to the pressure but I don't want to make myself out to be a weirdo in the office either. People will probably directly ask me why I am pumping.
I am not sure my answer will "suffice" since my son doesn't "need" breastmilk at that point. God forbid I say I am happy to continue the nursing...