How's it hanging?

I read an interesting article today about a survey of German men buying condoms in the wrong size. It says that most men don't bother to measure themselves first, and just get the Extra Large size - no surprises there. The surprise is towards the end of the article, when it quotes these statistics:

"only 18 per cent wore the right size, with nearly half squeezing into condoms that were too small and 34 per cent trying to use those that were too big."

Surely this means that, far from overestimating the sizes of their respective tackle, a large proportion were in fact underestimating themselves...