"Being 12 years old and having liposuction on your chest is quite a big deal," he recalled.
Sam Smith just revealed he had liposuction at age 12.
The 26-year-old admitted to "The Good Place" star he has struggled with his body and his relationship with it "since I can remember... since I was a baby."
He discussed how he was a chubby five or six-year-old and "it got worse and worse and worse" — until age 11, when he took his concern to a doctor.
"I was holding a lot of estrogen in my chest, I had more estrogen than many boys had," he recalled. "I had breasts. Like, fully had breasts. I had liposuction. I was 12 years old."
He said he was very happy about it at the time, but put the weight back on within two weeks, as he "hadn't figured out my relationship with food."
"Being 12 years old and having liposuction on your chest is quite a big deal," he said. "It was just the basis of all of my teasing, all of my bullying, my whole life, was my chest."
He remembered having "horrible experiences" at school, when one classmate grabbed his chest and started playing with it in front of all his friends. "That was horrible," he said. "It was f--ked up."
Even by age eight, he made his mother write notes to school excusing him from swimming, so he wouldn't have to take off his shirt.
Congratulating Jameela on the new project, the "Stay With Me" superstar admitted he felt a bit weird discussing it with her, because "guys don't speak about this" — especially famous men.
In the same interview, Sam -- who considers himself nonbinary and genderqueer -- revealed that he has previously considered having a "sex change," as "I do think like a woman... sometimes."
"I had breasts when I was 11 years old! I have a very feminine body. When I move, when I have sex with men, it's very feminine. I am feminine in many, many ways," he added.
He also said he used to send his trainer pictures of Tom Hardy, saying he had to look like him. "But I will never look like that because there's a bit of a woman in me that won't allow my body to move like that," he added.
"I put on weight in places where women put on weight. And I think that spin-balled everything actually. Because that's me looking at myself going 'maybe I'm not a man, maybe I'm not a woman, maybe I'm just... me? And that's Ok?"
"And also, how dare I not like my body? That's crazy," he exclaimed. "My mum gave birth to me. She loves my body. Suddenly you are looking at the body that your mum made, and put all that time into, and going 'you're ugly, you're this, you're that'. That's horrible. That's not okay."
Watch the full interview below: