The nipple has several tiny openings in it through which the milk flows during lactation. Nipples can sometimes be flat, with a 'line' through them, or inverted, where the nipple is indented inward. Neither situation is serious or dangerous since the baby can usually pull the nipple out.
So, no, the milk does not come out of a single hole, but nipples DO come in such a shape, and thus, this is simply the nipple shape preferred by the artist.
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The nipple has several tiny openings in it through which the milk flows during lactation. Nipples can sometimes be flat, with a 'line' through them, or inverted, where the nipple is indented inward. Neither situation is serious or dangerous since the baby can usually pull the nipple out.
So, no, the milk does not come out of a single hole, but nipples DO come in such a shape, and thus, this is simply the nipple shape preferred by the artist.