This ad is just too good to leave back in the 70s.  For those of you who had forgotten that America went through a period when an adult onesie signified “sex machine,” I present to you:  The Big Zip.  This Bee Gees meets Scarface meets gas station attendant getup has a spot on marketing message too, promising to transform you into a “walking turn on” because it “fits so tight it shows all you’ve got.”  Or perhaps one also has to carry around a giant wooden staff for maximum effect.