cundrum means: The condom was used until 1950s by Americans and possibly other English-speaking people. Condoms used to be sold in pharmacies and kept under counter. A young man would often carry a ring in his pocket to show the outline of the “ring”. Condoms were made readily available and marketed. This led to the popularity of current condom usage, making “cundrum” almost archaic. (in Community Dictionary, added by Raven Lowe)