We are glad you asked !!!!
Nipplebands, which come in many colors and sizes, can be put on by you or your partner, which is great for teasing.
They are perfect for inverted nipples as well.
There are a few nipple toys out there, Nipplebands are great for foreplay, if your looking to experiment. You can wear them to improve nipple size, for pleasure or appearance.
They are also great replacement bands for the erector sets or bulbs. They are flat and dont roll off.
Get "more" than your nipples excited!