By Matthew Schofield, Kansas City Star editorial board

A new study from The University of Rochester is raising concerns about some pretty common chemicals that are making boys less boy-ish.

Boys exposed to higher levels of the chemicals in the womb are less likely to want to play with toy guns or cars and are less likely to want to "play-fight."

The chemicals, phthalates, are commonly found in vinyl flooring, plastic furniture, packaging and shower curtains. Specifically, the study warns against DEHP and DBP.

In an interview with the BBC, Elizabeth Salter-Green, director of the chemicals campaign group CHEM Trust, said:

"We now know that phthalates, to which we are all constantly exposed, are extremely worrying from a health perspective, leading to disruption of male reproduction health and, it appears, male behaviour too.

"This feminising capacity of phthalates makes them true 'gender benders.'"

You know, as often as we're subjected to the latest "this will kill you" news, it's easy to get jaded to such reports.

In this case, however, I'm not in favor of this, not at all. Nature intends for boys to want to smack each other around.

Not exactly sure what can be done to keep pregnant woman away from plastics, but it sounds like it would be a good idea to refrain from sending gifts of packaged plastic furniture.