Remember when you didn't have to worry about anything on a cruise . . . except maybe a rampaging virus, with nowhere to hide?

The "New York Post" is exposing a disturbing trend, where female cruise passengers are stashing their room keys and pass cards in their BRAS.

One passenger who has been witnessing this says, "Twice I've seen ladies reaching into their blouses to locate their [passes] in their bras . . .

"This is frankly disgusting for the crew members . . . and for everyone who [touches them] afterwards.  Please just buy a lanyard."  

In the comments, people say they've seen the same thing . . . but some are laughing it off, saying that there are bigger concerns than "boob sweat."  Others are taking this opportunity to call for another solution, like using a digital wallet or wristband.