FOXBORO, MA - SEPTEMBER 3: Bill Belichick , coach of New England Patriots, talks to the media after a pre-season game with the New York Giants at Gillette Stadium on September 3, 2015 in Foxboro, Massachusetts. (Photo by Jim Rogash/Getty Images)

Typically monotone Bill Belichick cracked a sex joke leading up to the Super Bowl

The head coach of the New England Patriots channels his inner Eddie Murphy.

Bill Belichick channeling his inner Eddie Murphy? Believe it.

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That's what happened Friday when the normally stoic head coach of the New England Patriots joked about so many of his players having birthdays so close together.

(Wait a minute. I just used Bill Belichick and joke in the same sentence. That's a first.)

RELATED: Bill Belichick is going to take the air out of the ball in the Super Bowl. Someone really said that.

Here's what happened:

Now, "must have been something going on nine months ago, in those years" isn't exactly comedy gold, but for Belichick, that's side- splitting stuff.