I saw this in the "Bass Pro Shop" catalog. It is fake dirty underwear with a security pocket where the fly should be.
Heck, I have a ton of these, just need to sew the fly up!!!!!
Security Briefs - Disgustingly Funny Dirty Security Underwear Safe
Heck, I have a ton of these, just need to sew the fly up!!!!!

Security Briefs - Disgustingly Funny Dirty Security Underwear Safe
