One of the main causes of painful scrotal swelling is testicular torsion. This is an injury or an event that causes a testicle in the scrotal sac to twist and cut off blood circulation. This very painful injury could cause tissue death to the scrotum in a matter of hours. Medical conditions and diseases can also cause the scrotum to swell.
As said, credit and debit cards (cartes bancaires or cartes bleus) are widely used in France. This is also practical as automatic payments are common in France for things like train/metro tickets, parking, motorway tolls, etc.
Helpful comments are very welcome. The French have a long tradition of making excellent copper and brassware. Copperware is known generally as Dinanderie after one of the earliest medieval centres of excellence, Dinant, now in Belgium. Production has followed all the needs of the interior decorator from simple and minimalist through all the recognised periods.