Penis helmet 

A soviet era helmet, more commonly known as SSh-68 that closely resembles the head of the male genitalia.

Q: "Why are you wearing this stupid penis helmet Vitia? We got issued 6B27 helmets long time ago."
A: "What are you talking about, this is my father's trusty SSh-68"

Penis helmet by Minecraft superstar May 3, 2020

penis helmet 

A small helmet, usually made out of an alloy, used to protect the head of your penis. Can be worn with or without a dick strap.

To avoid bruising his cock, Mjolhner strapped on a penis helmet.

penis helmet by MurGaTroYd April 5, 2005