Shenanigans on Shrinkage

According to an Italian study, penises have shrunk 10 percent compared to 50 years ago:

The study doesn’t say how the research was conducted or give numbers. But it does provide several reasons for the shrinkage, including: weight gain, stress, smoking and alcohol.

Now, there are no links to the actual study itself, so shenanigans from the get go, plus methodology is not reported, so more shenanigans. But worst shenanigans: men were drinking and smoking a hell of a lot more 50 years ago than we do these days. Shenanigans all the way around on this "study."

Update: Just occurred to me: what if the researchers are trying to make the point that men need to smoke and drink more? Who sponsored this study? Altria and Inbev?