>>7840There are three grades to inverted nipples medically speaking. To have inverted nipples at all isn't average per say, but it isn't relevant at all unless you want to breastfeed, and even then you won't run into issues unless you're grade 2. For context
>Grade 1: Nipple is inverted at rest but pops out when cold or stimulated. (What OP and you describe).>Grade 2: Nipple pops out when directly pulled out, but quickly goes back when left alone. (Possible problem breastfeeding>Grade 3: Nipple permanently inverted, no way to "evert" the nipple.Again, this isn't massively important unless you want to breastfeed. Though it should be noted that if you went from not having an inverted nipple, to having an inverted nipple, that may be a sign of something serious. If you've had an inverted nipple since puberty though you should be fine.
