Now we know why Nick Jonas couldn’t keep his hands off his crotch at the YHA’s

Appearing on The Tonight Show With Jimmy Fallon, Nick Jonas reveals he had an unexpected bodily incident at the 2014 Young Hollywood Awards.

And by “bodily incident” we mean a boner. Or as the “Close” singer dubs it, a NARB – Non-Apparent Reason Boner”. Well, you learn something new everyday.

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Nick Jonas was on the NBC talkshow Monday night to promote his latest album Last Year Was Complicated.

The now 23-year-old singer revealed he tried a weed lollipop the a day before he was scheduled to present at the Young Hollywood Awards.

Unfortunately, Jonas woke up with Mary Jonas still in his system, and went to the awards in “slow-motion.”

It gets worse.

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Just as he was about to leave his car, the teen star experienced a NARB, something that every guy gets from time to time. Unfortunately for Jonas, the timing made his a bit tricky.

Here’s proof of Jonas trying to hide his NARB at the Young Hollywood awards.

As embarrassing as that was, the youngest Jonas Brother said this never-been-told-before Hollywood dish marks a new milestone for his friendship with Fallon.

Watch the full segment below.

Nick Jonas released his third solo album Last Year Was Complicated last week. The album features collaborations with Tove Lo, Ty Dolla $ign, Big Sean and Daniella Mason.

Let’s just hope he doesn’t get another NARB when goes on tour with Demi Lovato this June 29.