[wodenokoto]

off-topic, but is there a difference between the how many cents you use in this idiom?

[echelon]

The idiom is always "two cents". The parent was implying that because the GP didn't add much to the conversation that this subtracted a cent.

[jeeva]

There is a little use of five cents here. Not lots, but it's not unknown for it to change amount.

...still no correlation, though.

[labster]

Only if you have zero sense.