Yeah, it's hard for me to put much stock in such a "study".
Did they circumsize Joe after marriage, and ask Jane "before" and "after" questions?
Or did they ask Jane about the difference between Joe and Fred?
Either way, it hardly seems like a valid comparison.
I'm glad I'm not the only one who questions it. It's probably closer to the truth to say they don't really know, but everybody has an agenda and pulls out various statements and studies to support their stance.
It's very, very low on my priority list of things to worry about, like on the negative side of the scale.