Where do I even begin with a story like this? Oh. OH! I know, I'll mention that the lead author of the study's name is Steve Ramm.
And now for the money shot, er, quote:
Ramm found the Western harvest mouse (Reithrodontomys megalotis) had the lengthiest penis bone relative to its body mass of all rodents examined.
"Everything's relative, of course," Ramm said. "So although big for its body size, the penis bone in R. megalotis is still only 7 to 8 millimeters (0.27 to 0.31 inches) long. I don't think the phrase 'hung like a harvest mouse' will be catching on any time soon."
Dude. At least he knows how to give good quote. And hey, give "hung like a harvest mouse" a chance. If the prevalent spam is any indication, I think a lot of guys out there may want this quote to be popular.
Alright, Re-Title the Study Contest in the comments!