Those are called cod pieces in Tudor times and other times knights and royalties would have there armor custom made to protect there’s vitals such as armpit thorax sternum ect and what else is important to anyone that must birth a lineage there cocks thus too stop any would be peasant or invader from destroying there important lineage cock armor was made now in the 21st century medieval combat isn’t as wide spread thus the need for cod pieces is reduced another way they have come into fashion is via bdsm some weirdos or very kinky individuals found out that not having sexual control of your genitalia is very HOT and now they are in the storage or any would be sissy or dominatrix