Donald Trump has been forced to defend the size of some of the more private parts of his anatomy in the GOP Presidential race.

As the Republican debates around the presidency only get weirder, frontrunner Trump responded to suggestions by Marco Rubio about the sensitive subject.

“He’s always calling me Little Marco. And I’ll admit he’s taller than me. He’s like 6’2, which is why I don’t understand why his hands are the size of someone who is 5’2,” Rubio said earlier this week in Virginia.

“And you know what they say about men with small hands? You can’t trust them.”

In response, Trump said, holding up his hands: “Look at those hands, are they small hands?”

“And, he referred to my hands — ‘if they’re small, something else must be small.’ I guarantee you there’s no problem. I guarantee.”

Not the first time Trump has endured jokes about his anatomy.

Vanity Fair’s Graydon Carter wrote in 2015:  “Just to drive him a little bit crazy, I took to referring to him as a ‘short-fingered vulgarian’ in the pages of Spy magazine. That was more than a quarter of a century ago.”

Of course the internet poked fun at Trump following the jibe, some tweeting photoshopped images of his hands (see above), others used Hillary to make their point.

Hillary Hand

This is not the first time the debate has turned to genitals this week, as Trump responded with a blowjob joke after failed Presidential candidate Mitt Romney warned that fellow Republican Donald Trump is not fit for the Presidential nomination.

In a speech on Thursday Romney, who lost to President Obama in the 2012 race, and previously in 2008, warned his party against nominating the Apprentice star as the candidate.

Mitt Romney

He branded Trump a “phoney” and a “fraud”, suggesting that Trump as President would be dangerous for the Republican party and the US.

Trump hit back, calling a news conference, and saying that Romney “begged” for his endorsement.

“I could have said, ‘Mitt drop to your knees,’ and he would have dropped to his knees,” Trump said. “Mitt is a failed candidate – he failed. He failed horribly.”