Tyra Banks was on 'Piers Morgan Tonight' and the talk -- about skinny models and men being brainwashed to think that's what they want when, biologically, they want to feel softness next to them -- turned to breast augmentation.

Banks, 37, told Morgan about her early days as a model, when magazine covers showed off her assets and people thought she had fake breasts.

To prove that they're real, Banks once exposed them to the studio audience on her talk show, before having a doctor run a sonogram over them so they could be declared implant-free.

But just because she went to great pains to disprove rumors of breast augmentation, it doesn't mean she's anti-plastic surgery.