If you've seen There's Something About Mary and you're a man, then you are haunted by one particular scene involving Ben Stiller, a pair of corduroy's and a zipping mishap.

Every single day, every man out there is taking their life in their hands . . . when they zip up a zipper that's so DANGEROUSLY and MALICIOUSLY close to their junk.

Listen up guys:  We've got the results of a new study that shows just how DANGEROUS zippers are for your package.

Researchers at the University of California, San Francisco found that precisely 17,616 people had to go to the EMERGENCY ROOM between 2002 and 2010, because their genitalia got in a battle with their zipper . . . and lost.

That's about 2,000 E.R. visits every year.  Almost ALL of those were men, and in almost every case, quote, "The penis was the only genital organ involved."

Not surprisingly, that means that for adults, zippers are the number one cause of penile injuries.