"Why are you tweeting me?

Jimmy Fallon kicked off his show Monday by addressing President Donald Trump's Twitter attacks on him – and he asked the president a simple question: "Why are you tweeting me?"

"Before I start, I just want to give a nod to the number one fan of our show, the President of the United States!" Fallon said. "As you may have heard, last night the President of the United States went to follow me on Twitter, so Melania, if you look at it, I do not think your campaign against it. intimidation works. "

Fallon told his audience about NBC's "The Tonight Show" that he had planned to tweet immediately to the president on Sunday night, but realized that he had "more important things to do."

"Then I thought," Wait, should not he have more important things to do? " Fallon said to laugh. "He's the president, what are you doing, why are you tweeting me?"

Related: Trump goes after Jimmy Fallon

Trump called the host Sunday night tweeting that Fallon "now moaned to all that he did the famous" hair show "with me (where he severely bitten my hair), and that" I'm going to have a good time. he would have done it differently because it is said that he "humanized me." The president then told Fallon "to be a man".

Trump was referring to a moment during the 2016 presidential campaign when Fallon missed Trump's famous hair on "The Tonight Show". The moment became viral and led to criticism for Fallon.

In a recent interview with The Hollywood Reporter, the host explained that he was not trying to "normalize" Trump. Fallon also stated in the interview that it was "an error" and that in retrospect he would do it differently.

On Monday, Fallon seemed puzzled that Trump had attacked him on social networks.

"It's crazy, the president went after me on Twitter, it's pretty much the only thing I have in common with the NFL players," said Fallon, in reference to Trump's attacks against the NFL and its players last season.

Related: Jimmy Fallon can not find a happy medium in the partisan division

The host also challenged Trump's claim that Fallon had called him to tell him that he had "monster ratings".

"I've never called this human in my life, I do not have his number, I do not want his number," Fallon said. during the show. "By the way, Donald, I do not know if you've seen my grades in the last two years, but you have not helped."

In response to Trump's tweets, Fallon tweeted Sunday that he donated on behalf of Trump to the Refugee and Immigrant Center for Education and Legal Services, also known as "RAICES" , a non-profit group.

"When Trump heard, he said," I love RAICES, it's my favorite cup of peanut butter, "Fallon said Monday.

CNNMoney (New York) First published on June 26, 2018: 12:54 ET