Answer (1 of 3): Lots of nipples are flat. If they were puffy nipples you would be asking why puffy. If protruding nipples, you would be asking why protruding nipples”. They are all normal. When cold they can crinkle up more. That is normal too. Be happy if both match. Be happy too if they don’t
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Why are my nipples flat? I'm 15, and I've hit puberty, but for some reason, my nipples are flat. - Quora
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