Conversation so far:
What happened after the Mike Tyson vs. Evander Holyfield I match?
Mike Tyson and Evander Holyfield fought again on June 28, 1997. The fight was stopped at the end of the third round, with Tyson disqualified.
How was Mike Tyson disqualified in his second fight with Evander Holyfield?
The fight was stopped at the end of the third round, with Mike Tyson disqualified for biting Holyfield on both ears.

Question: Why did he bite him?
Self-contained rewrite: Why did Mike Tyson bite Evander Holyfield?