Jessica Walsh of Sagmeister & Walsh Sagmeister & Walsh / Mario de Armas We recently highlighted Sagmeister & Walsh, a design boutique in New York, in a gallery of crazy, beautiful ad agency staff photos.

Their image was arguably the most unforgettable of the set, because the entire staff — from the CEO down to the interns — posed naked.

Not just a little bit naked, either.

The full monty.

It turns out there's a reason the agency does this, and partner Jessica Walsh explained it in a video series called The Creative Influence.

Here's the two-decade history of S&W's staff photos, which — obviously — are graphic.

They're not gratuitously sexual, but they're not safe for conservative workplaces either.