Inter Miami’s Luis Suárez further damaged his reputation. Jalen Carter of the Philadelphia Eagles cost himself the chance to play in a season-opening game. Florida’s Brendan Bett gave South Florida a 15-yard gift on its drive that decided its win over the Gators. Their transgression: spitting. In the span of seven days from last Sunday through this past Saturday, there were three high-profile spitting incidents in sports. They were immediately condemned, including by those close to the offending parties such as the Florida coach who called such behavior “unacceptable.” The reviled responses show there are limits to allowable aggressions, even in the most heated competitions.

“There are a lot of written and unwritten rules about how you interact with others,” said Dr. Peter Valentin, the c

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