USE CAUTION WHEN USING TEETH TO CASTRATE LAMBS. Sounds like good advice. According to Marc Abrahams at io9,
"On June 29, 2011, the Wyoming Department of Health was notified of two laboratory-confirmed cases of Campylobacter jejuni enteritis among persons working at a local sheep ranch. During June, two men had reported onset of symptoms compatible with campylobacteriosis. Both patients had diarrhea, and one also had abdominal cramps, fever, nausea, and vomiting. One patient was hospitalized for 1 day. Both patients recovered without sequelae. During June, both patients had participated in a multiday event to castrate and dock tails of 1,600 lambs. Both men reported having used their teeth to castrate some of the lambs. Among the 12 persons who participated in the event, the patients are the only two known to have used their teeth to castrate lambs."
Human behavior has an almost infinite range. The more people there are, the more possibilities. With almost 400 million people, the US and Canada have the feedstock to produce a lot of bizarre behavior. We ain't seen nuthin', yet.