because the part of his BRAIN
that should know
The Big Bang Theory Season 5, Episode 21
All right! All right!
I'll shake the BRAIN bush
The Big Bang Theory Season 7, Episode 21
♪ Sheldon and
his BRAIN-- yeah! ♪
The Big Bang Theory Season 7, Episode 6
without getting
BRAIN freeze.
The Big Bang Theory Season 7, Episode 13
♪ Sheldon and his BRAIN, yeah
The Big Bang Theory Season 7, Episode 10