Hey -j,
 
      When I started NBE I tried numerous items, it should come with manual or something, right?. I tried those nipple suckers at first, then started noticing they where getting bigger, but they would go back to normal shortly after. I'm not sure how long it was when they stayed the way they are now. I was a little freaked at first, but I don't know about genetics, mom's gone so can't ask her (don't think I would either).
 
Take care