You know what? I'm thinking Howard
wasn't making a back-scratching METAPHOR.
The Big Bang Theory Season 2, Episode 16
I believe this is an extension
of the death METAPHOR.
The Big Bang Theory Season 2, Episode 8
Luckily for you,
that's where the METAPHOR ended.
The Big Bang Theory Season 1, Episode 15
...the terms of your METAPHOR
by acknowledging her existence. I'm out.
The Big Bang Theory Season 2, Episode 8
Wow, was that your first ever
sports METAPHOR?
The Big Bang Theory Season 12, Episode 10