Refers to the external sexual organs; a somewhat formal or euphemistic term.
I was embarrassed because my private parts were almost visible through the swimsuit.
shameful secret; disgraceful aspect; underbelly
Used figuratively for a hidden, embarrassing, or shameful part of something, such as an organization's dark side or a person's secret shame.
The politician's shameful secret was exposed in a weekly magazine.
They tried to cover up the company's disgraceful aspects.