Something a bit more historical.
These are diamond miners being strip searched in Kimberly, South Africa. Obviously diamonds were and are incredibly valuable so searches at the mines were incredibly thorough. As well as the standard removal of clothes and checking of mouth/ hair/ foreskin etc., internal checked were also used.
I'm not sure how effective they were as someone could just swallow a diamond and then search their poop the following day for it.
This article gives more information (for anyone with access through their institution/ library) -
https://www.tandfonline.com/doi/abs/10.1080/03087298.2018.1429095