[prostatenipple]

Did you put it directly on the nipples?  Might want to try the chest but avoid directly on the nipples.

I did. That's half the fun! Rubbing nipples with hot cream that might make them grow or get sensitive.

Nipples / breast ached for about a week, felt like I had a spot / zit, but inside. It's calmed down now, but just under (beneath) the nipple it feels slightly sore.