Earlier this week, we introduced you to the year’s greatest gift idea: mink penis bones.

In the future, they may be harder to acquire if minks take up after their fellow woodland creatures and begin wearing protective apparel, such as these sweet tighty whities we came across at an outpost of Therapy, the groovy seven store Bay Area mini-chain.

Next year, opossum thongs!

Which reminded us…the biggest SF skivvie disco of the summer is next weekend’s Underworld, on Saturday night at 525 Harrison Street. As Daniel Day Lewis once said: There will be nuts.

Larger animals may want to do their partying over at the Rickshaw Stop on Fell Street, where Bearracuda will take over for the evening.

Squirrels, otters, and the occasional wombat partied at last Labor Day’s Underworld. (Photo: Marques Daniels Photography)

Before you scurry along to seek more nutritious internet fare, please enjoy the official Squirrel Underpants video, after the jump.