Donald Trump's hair has been a comedic gold mine for late-night talk show hosts since ... well998 Archives pretty much forever.

On Thursday, Jimmy Fallon got to touch it on The Tonight Show.

Fallon asked the Republican presidential nominee -- fresh off visiting Dr. Oz and terrifying a little girl in Flint, Michigan -- if he could touch his hair.

Trump paused, apologized to the people of New Hampshire (where he was headed next), and finally agreed.

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And so, Fallon reached out and mussed the candidate's hair, which didn'tfly off, come alive, or turn Fallon to dust.

It was a fun, light-hearted moment of television that humanized Trump -- which is exactly what some people weren't happy about.

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While Trump seemed like a good sport on the show, he reportedly didn't let members of the press pool photograph his hair afterwards -- perhaps because he kind of looked like a Troll doll.

Democratic presidential nominee Hillary Clinton will visit The Tonight Shownext week. Chances are Fallon will leave her hair alone.