Guys dressed in only their underwear and splattered with glow in the dark body paint packed a black light party at Jungle on Saturday. Briefs, boxers, square cuts, oh my!

Powered by the beats of DJ Randy Bettis and overseen by a 60-foot dragon hung from the ceiling, the Ultraviolet Blacklight Underwear Party brought out the boys dressed to impress – even if that meant the skimpier the better. Party-goers even took to heart our seven tips on prepping your package before the big night.

This is an annual tradition—check out our photos from 2011—that turns out hundreds of guys, and even some gals, unafraid to pack their assets into fashionable underwear for all to see.