Why did Soupy look DOWN when the naked lady came to the door?

I've had a few remarkable experiences in my life. One was somehow getting onto the set of The Soupy Sales Show at WNEW-TV in New York in 1965. Another was finding the pictures I took on that occasion nearly forty years later (that's one of them above). I've posted Soupy videos here and here on YouTube, and to the available Soupy on the 'net, I now add Soupy Sales on The Tom Snyder Radio Show (36m) - an old hour-long interview (minus commercials) in which Soupy reveals why, in that famous NSFW outtake, he was looking down when he opened the door.