Mine are large (very large, in fact, at present) sensitive (annoyingly so at the moment) with permanent nipple erection and vary in firmness depending on the time of day and how recently I fed my baby. Oh yes, and they drip (and sometimes squirt) milk!

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"Time flies like an arrow -
Fruit flies like a banana"

M Y - N A U G H T Y - P I C T U R E S ! !