Conan O'Brien and The Walking Dead's Steven Yeun decided to spend the day at a Korean spa for some much needed stress relief — and the results were pretty hilarious!

O'Brien's first shock was the discovery that clothes were completely prohibited in the spa, despite his plea to staff that he be allowed to keep his jeans on.

Eventually agreeing to spend the day buck naked, the pair enjoyed, (or at least, participated in!) several health and beauty treatments.

They screeched and yelled as they entered a boiling hot jacuzzi (surrounded by other naked men, something O'Brien felt the need to yell about some more!) before joining some other nude gentlemen for a sauna.

Somehow O'Brien got into conversation with an older man, who moved to sit close to the talk show host, and then start touching his chest. But the real fun was still to come!

After jumping (very vocally) into the cold tub, it was O'Brien’s full body scrub that made truly amazing viewing.

"This isn't funny Steven," O'Brien yelled, "it really hurts!” as his spa buddy collapsed into fits of giggles, watching his pal's pain. "These are freckles,” he screamed at the spa employer. “They stay on!"

Watch the whole video above and see what happens when the spa scrub moves into an all together more intimate area!