Researchers have found a way to grow new organs by grabbing cells, spraying them onto a protein frame, dunking them in "growth-stimulating compounds," and then sticking them in an oven. Naturally, they're using this technique to grow rabbit penises:
The…penises responded normally to electrical and chemical stimuli, and — more importantly — to biological imperative. When given the chance to have sex, eight were able to ejaculate, and four became fathers.
And a bonus:
Oddly, the procedure seemed to make the rabbits randier than usual.
"Most control rabbits did not attempt copulation after introduction to their female partners," wrote the researchers. "All rabbits with bioengineered neocorpora attempted copulation within one minute of introduction."