Wall-E does not have a really strong shoulder. His waist is not really fitted. And his chest is not that much accentuated… But he still need bras, I don’t really understand for what robotic purpose though:
(Click on a poster to enlarge it.)

WALL-E
The Most Advanced robot in the world (loves to wear bras).

More about this upcoming Disney Pixar movie at: Wall-E

More likely he just snapped Eve’s bras!!! Naughty Wall-E! Beware of the advent of the sex-maniac robots! All makes sense if you think about the name of the company in charge of cleaning Earth: it’s Buy-N-Large like an advert for enlarging you know what…
;-)