This is more common than you would think for repeat offenders. That’s where they hide their stash but they need to get it out and turn it over before making it to jail. They get the possession charge but avoid the charge of smuggling contraband into the jail facility. But I’d choose the front hole over the back hole if a) I was female and b) holding a stash.
There have been several article shared here about women hiding pistols in their “private parts.”