![I believe the back-scratching metaphor
describes a quid pro quo situation...
I believe the back-scratching metaphor
describes a quid pro quo situation...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I believe the back-scratching metaphor
describes a quid PRO quo situation...
The Big Bang Theory Season 2, Episode 16
![Pro tip: if you find
strong women sexy,
Pro tip: if you find
strong women sexy,](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Pro tip: if you find
strong women sexy,
The Big Bang Theory Season 12, Episode 19
![- Where do you stand on it?
- Strongly pro.
- Where do you stand on it?
- Strongly pro.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
- Where do you stand on it?
- Strongly PRO.
The Big Bang Theory Season 6, Episode 1
![FYI, part of your responsibilities
as roommate pro tem...
FYI, part of your responsibilities
as roommate pro tem...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
FYI, part of your responsibilities
as roommate PRO tem...
The Big Bang Theory Season 4, Episode 24
![- And finally, area rugs, pro or con?
- Pro?
- And finally, area rugs, pro or con?
- Pro?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
- And finally, area rugs, PRO or con?
- Pro?
The Big Bang Theory Season 2, Episode 19