It’s the time of year again when the streets of San Francisco become a BDSM playground. The annual fair is held at the conclusion of Leather Pride Week and attracts some 400,000 people. Because of San Francisco’s unique laws around public nudity you can rock up to the parade wearing a jockstrap, harness, or nothing at all. It’s a free for all, in every sense of those words.

When you get a bunch of kinky, naked gay men all on a street together, well some things are bound to happen. What are you supposed to do when a game of naked twister ends with your foot on yellow and your ass in the air? Or a muscle daddy in a leather harness gets hard while eyeing you up?

The fair has become notorious as the dirtier (and more fun) alternative to the sanitized and more commercial aspects of Pride. Folsom has embraced what gay men do best, and we’ve selected a few naughty vids from the day to wet your appetite.

WATCH: Ant & Lee hook up in the woods