8 Celebs Who Dared to Share Embarrassing Childhood Stories

The Fifty Shades of Grey star recounted the whole wild tale on The Graham Norton Show. Dornan explained that he was a "late developer" and "looked about 7" at the age of 15. Consequently, a light bulb went off when he was given a wig to use as a beard in a play.

"So I thought it would be a good idea after the curtain came down on this play, and I'm going to this [rugby] party after, and I meet a girl and maybe she drops a hand. So I had the idea to maybe to cut off some extra hair," the actor said. "By the way, I was a very fair child, I had blond hair. So I went into the toilet and I cut off some of this very curly, jet-black hair. I put it in a wee pile and got my [glue] and just [stuck it on]."

"I got home and it was a car crash down there," he went on. "I'll tell you why the removal was so painful, physically and emotionally. I did actually have about three pubes — naturally developed pubes — they went as soon as I [ripped the fake ones off]."

Of course, it took a sister to get her to share the story with the world. "I was, like, 5 and I, like, s--- myself," Jenner confessed in a video for Cosmopolitan. "No, she didn't just s--- herself," her sister, Kendall, chimed in. "She pooped all the way up the stairs, and it was all over the carpet. And our stairs turned around and went back up. So she left a trail of s--- all the way to her room."

The DNCE singer's adolescent plans to keep his porn-viewing habits under wraps were — well, poorly planned. "I would use my address to log into the websites, and I did this for seven days straight," he told Notion about visiting explicit sites. "A month later — and by the way, my dad was a pastor at the time — for a week or two straight there was a postcard with a naked woman on it saying 'Come join us again, Joe' or 'We really miss you' or 'You naughty boy. Come visit us again.'"

During a Late Show visit, McAvoy recalled a humiliating incident when he tried — and failed — to manscape at a young age. "I actually did once try to shave down there when I was young. And I used my granddad's razor," he began. "It was a bit abortive, and I stopped halfway through and was I like, 'You know what, this isn't working for me.'"

"And so I went upstairs to my bedroom, and then I get this voice from downstairs. It's my granny and granddad and they're both standing at the bottom of the stairs and they're going like, 'James, James, son… would you come downstairs and have a wee chat?'"

"And they were like, 'Is there something going on?' And I was like, 'What do you mean?' And they were like, 'Show us you wrist. We just saw your granddad's razor and there's blood in it, and there's blood in the toilet. Show us your wrists, son!'"

When his grandparents continued to demand to see his wrist without relent, McAvoy finally let the truth out: "I was like, 'I've been shaving my b----!' ... And it took a while before they gave me the talk about hygiene and how my grandad uses that razor on his face."

The actor's wife may be one of the most envied women on the planet these days, but Tatum had his fair share of lady troubles growing up. "The first girl I ever kissed was named Danica. She broke up with me through a friend who yelled — out the bus window — 'Oh yeah, Danica doesn't want to go out with you anymore.' The whole bus burst into laughter," he told Elle.

Basically the worst thing you can imagine happening while talking to your childhood crush happened to Payne. "When I was 7, a girl I really liked tickled me and I wet myself. Then she laughed, 'cause she was a lot older, but I cried and it was terrible. I actually really fancied her and I'd ruined everything," he admitted to Top of the Pops magazine.

Luckily, the One Direction singer actually had the chance to make up for the horrifying moment years later: "I saw her the other day, 'cause she came to our concert. So it was one of my redeeming moments: 'You just came to my concert so now you can let me off wetting myself.'"

"I was 12 or 13 years old, so the peak of embarrassment and horribleness," Banks shared on The Tonight Show. "He's driving in the front seat … He hocks up a loogie, spits it out the front window, aerodynamics takes it right into the back window and slaps me in the face with it … His loogie smacked me in the face."

We may not be able to relate to the exact circumstances, but we can definitely empathize with Watson's still-traumatic childhood overachieving. On Jimmy Kimmel Live, the actress and the host watched throwback outtakes from the first Potter film, in which she can be seen mouthing along as her costars say their lines. "You laugh, this is actually quite traumatic for me because I created issues because of this," she shared. "Yes, I would ruin takes. [Director] Chris [Columbus] would be like, 'Cut. Emma, you're doing it again. You're mouthing Dan's lines,' and I'd be like, 'Ooo, I'm so sorry, so sorry. Oh, I feel so bad.' But I couldn’t help myself. I was such a loser, I really loved those books, I really wanted to do my job well, and I kind of overdid it."