Heid the Ba' wrote:Traditionally surveyors n the UK use a "17p tell tale"*, by sticking a postage stamp across the crack and seeing how it is affected with time. Your postage may vary.
* postage is far more than that now, but the term remains.
I know the "postage stamp" or "tumescence" test from urology: In cases of erectile dysfuntion, man's best friend is wrapped in postage stamps. If the perforations between them are torn the next day, nightly erections have, in fact, occurred, and the erectile dysfunion is probably not organic.
I have always wondered which result I'd prefer, had I to take the test.