[Pansy-Mae]

You should avoid getting the cream on nipples and areola because, for some unknown reason, it can discolour them.

Personally, I've read come across similar advice multiple times/sources and yet have disregarded it with no noticeable difference whatsoever with regard to potential discoloration.

Well, tbh I've only actually read about it myself, BUT I did accidentally get cream on my nipples and within a couple of minutes they weer kind of burning and sore, so I made very sure not to do it again. It seemed to me that the effect I felt could easily be associated with a bleaching effect.
Then again, I also saw no advantage, developmentwise, of cream over caps and the caps are cheaper so I went back to caps.