Double breasted Puns

So my wife just got her breast pump all set up. She's got the double suckers rolling, tits out, milk flowing like a minor tributary. And I ASK "ARE YOU PUMPED?!" fucking genius.... She stared silently for like 10 seconds. Then told me to post here.

On a road-trip to Ohio, wife needs to use the new electric breast pump to feed our 3 week old.
W-What batteries does this thing take?
Me- Double D's.
W- Get out. I'm driving.