For what it's worth:

I think it would be great if Mudcat members and guests who remember this custom would include demographical information with their post, particularly when they first remember saying this pinch punch line {such as the year or the decade} and where they live/d when they remember saying this line {such as city/state and nation if outside of the USA}. This is just a suggestion in the interest of arm chair folkloric information sharing.

Thanks.