I want to edit the existing wiki I did for nipple dip months ago, since I have more details for nipple_dip
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Nipple dip is when the nipples have a dip or slit in them.

Examples of nipple dip:
post #4164878 post #1922394 post #4475193

Examples of no nipple dip:
post #3800290 post #4416750 post #4516511

Examples of strong nipple dip:
post #4163396 post #684281 post #4240802 post #4485162

Examples of weak nipple dip:
post #4317342 post #4173746 post #4473459

Examples of nipple dip through clothing:
post #4468674 post #4515372 post #4486085

Nipple dip is not to be mistaken with inverted nipples, though in some cases both can be in the same image.
post #709668 post #4291709 post #4504897

Nipple dip is also visible from the side, or even back view.
post #4474279 post #4474259 post #4474206

Nipple dip isn't limited to only females:
post #4169251 post #4383792 post #4166850