Oops, sorry for the typo that was supposed to be "coerced" not "corrected".

Spiffy is most correct. I am an English speaker, and I use this expression quite often. It is an ironic idiom most similar to, "twist my arm". As in "Q: Would you like this money, I found it on the ground? A: Well if you must twist my arm." Or "B: I don't mind if I do."

It is ironic that you must be corrected to accept such a thing, and is said tongue in cheek.

The "I" is most definitely the subject being omitted, but the expression is not literal or impolite.