STI transmission has nothing to do with how you shower or how intact your foreskin is. It's still recommended to shower peoperly out of respect for yourself and your partners... But men being circumcised or not, and the way they clean down there, has no correlation with the spread of STIs. An STI isn't something you can wash away in the shower otherwise nobody would get them. You're spreading misinformation.
STIs are caused by bacteria or viruses that infect the body upon contact, meaning they cannot be washed off. The most effective prevention methods are using protection, regular testing, and, for some, PrEP.
