'Naked and Afraid': Watch Your Step!

Discovery's Naked and Afraid is the ultimate survival show, but there's also some serious comedy to be found in a show about a bunch of naked people battling the elements. In ETonline's exclusive clip from this Sunday's special two-hour episode, let's just say, "Where's a port-o-potty when you need one?"

Hollywood's Hottest Bikini Bods!

In Sunday's episode, two pairs of strangers, unaware of the others existence, are dropped miles apart in the unforgiving Panamanian rainforest to survive for 21 days under the harshest of conditions. Watch as each couple battles the elements, each other, and their own inner weaknesses to see who will triumph over the terrain or who will fail under the force of nature.

Related: Zac Efron Naked In 'Awkward' Trailer 

Discovery's Naked and Afraid airs Sunday at 8/7c.