In last year's "No Adjustment Needed" campaign, underwear brand Tommy John showed the consequences of ill-fitting underpants with a hilarious film featuring men trying to adjust their nether regions on the sly.

The brand (in which comedian Kevin Hart has just bought a stake) now turns its attention to undershirts, with the idea that badly-fitting ones make you feel like you have ferrets down your front. So it literally put live ferrets into the ad. As we see them ferreting around at all kinds of inappropriate moments -- including a wedding, on the golf course, filming a movie scene and during a political rally -- it's almost impossible not to squirm.

Preacher is the agency responsible, and the spot was directed by Neil Harris at Smuggler. If you want to see more ferret action, watch the behind-the-scenes film (in which we're reassured, thankfully, that none of the actors were harmed.)