For a show which has been described as featuring "two underwear models who fight demons" source, the men in the show are remarkably shy about showing some flesh. In fact, it has been remarked that fans are turned into modern versions of Victorian ladies, as many fans are known to grow faint when the boys where anything less than 3 layers of clothing.

Dean

Dean checks out his perky nipples after he returns from hell in Lazarus Rising

Our first glimpse of a shirtless Dean is in the form of a shapeshifter shedding its skin! At the Paley Festival in 2006, writer John Shiban spoke about the gratification he got from coming up with scary concepts and effects.

"A fan was watching the show and giving her impressions as she watched it, “Oh my god, Dean’s taking his shirt off!” And followed immediately by, "Oh my god, he’s taking his skin off!" I knew then that we had it. I was very pleased with that."

Dean is sleeping without a shirt on when John Winchester makes direct contact with the boys for the first time.

Dean gets his shirt (and more) off when he and Cassie get it on!

Dean's chest is seen when he is dying, as the medical team works to revive him and the reaper Tessa tries to convince him to accompany her to the afterlife.

Dean wakes up naked next to Carmen in the Wish-verse induced by the Djinn.

Dean comes back from the dead, and takes a moment to check out his lack of hellhound scars and the new hand-shaped brand on his shoulder in a gas station mirror.

Dean shirtless in Meta Fiction - although this actual shot appeared only in the promo

Dean gets five minutes in Heaven - with an angel no less. In this tender love scene in the back of his beloved Impala, Dean takes off not only his shirt, but also his amulet while making love to Anna Milton.

Dean has some morning loving with Lisa - oops no it's just a dream. But shirtless is shirtless!

Despite Dean's commitment to safe sex, this encounter with an Amazon called Lydia got him shirtless and her pregnant, resulting in the birth of Emma. It's a long time before Dean gets his gear off again.

Dean, troubled by the effects of the Mark of Cain takes an angsty shower. The three-week break between this episode and the last one was been dubbed #ShowerHellatus by fans on Twitter because of the images of Dean in the shower in the promo for the episode. You can view the shower scene here.

Dean, or rather Demon Dean has a lunchbreak quickie with Anne Marie, the waitress in the dive (which seems to have accommodation), that Crowley and him have been living in whilst howling at the moon - which seems to involved karaoke and fussball. We see Dean shirtless - in bed, with a sheet around his waist. Later he stands up and puts his a t-shirt, but not pants - which Crowley points out with exasberation. You can view the bed scene here.

Sam

Sam in The Third Man. Apparently having no soul makes you look really ripped.

Sam emerges from the shower wearing a towel.

Sam and Madison get naked and bitey. He then has to shoot her. Just another example of the phenomenon known as Sleep with Sam Winchester and die!. You can read the original script of the Sex scene from Heart.

A vast expanse of Sam's abs and a hint of nipple can be seen as Sam stitches his own bullet wound.

Both Sam and Ruby get very naked and have very wrong and very hot hate sex.

While consulting with Dr. Cara Roberts on a case, Sam takes his shirt off for entirely non-medical reasons.

Sam wakes up naked in bed with Jessica, who actually turns out to be Lucifer. There was a deleted scene from the episode, a sex scene between Sam and Lindsey the woman he worked with in the bar, while he and Dean were on a break. A fragment of it aired in a promo for the next episode, confusing and disappointing many viewers.



Soulless Sam does a series of chin-ups sans shirt in his hotel room.

While Dean is being probed by fairies, Sam hooks up with a patchouli drenched hippie called Sparrow Jennings.

In the process of having sex with Amelia, Sam takes his shirt off.

Sam doesn't wear a shirt in his visions of Hell.

Both Sam and Lady Toni Bevell are bereft of clothes in Sam's love hallucination.

Castiel

Castiel is literally ripped in Point of No Return

Castiel tells Sam and Dean that the Green Room where Adam is being held is in Van Nuys, California, guarded by a number of angels. Castiel says he will fight off the angels, giving Dean and Sam time to get Adam. Dean notes that Castiel taking on five angels alone is basically suicide, and Castiel says he would rather face it than Dean failing (or saying yes to Michael). A common response to being pissed with Dean is for people to take their shirt off. Castiel then carves a Angel Banishing Sigil into his chest because he is a BAMF. He approaches the angels guarding the room, then rips off his shirt to invoke the power of the bloody sigil to banish the angels.

Misha Collins on the sigils on his chest at Salute to Supernatural Chicago 2011:

"People say it looked painted on? The truth is, I went through a hell of a lot for people to think it was just painted on. I’m permanently disfigured. I read the script, and they had an image there of how they wanted the sigil to look like, and I did it before coming in to shoot that morning at home with a straight razor. And then they had a special effects make-up person, unbeknownst to me, who is there for the day. Well obviously, they didn’t have to do anything, because I had already done it. But yeah, I guess they were planning to do some sort of prosthetic and make it look like it was carved in, but they didn’t have to because I had already done it. The shooting took a little longer than usual because I kept fainting from bloodloss. But I think you would agree, that it led to authenticity." source

Castiel does laundry by stripping down to his boxers in a laundromat. He then decides to spend his money on food and drink instead, and leaves behind the precious Castiel's Trench Coat.

Cas has sex with April who turns out to be a Reaper who tortures and kills him. But in a brief post-coital moment we do get to see his new tattoo.