Sometimes it depends on your skin color like pink is for white people and brown is for darker skin or black people. But it is also depends on your weight to sometimes and it might change.
Old nipples are dark brown and rather wrinkly whereas young nipples are pink or very light brown, plump and wrinkle-free!
i personally like brown nipples they are more appealing (they turn me on) but you have to be tan.
pink if she has red hair
There supposed to be brown, I think.
Because they are hot?
sea lion is brown a dolphin is pink or Gray
Dolphins and Pink Dolphins are almost exactly the same. This question is equivalent to what is the difference between a brown bear and a black bear. They are two different species, but the same animal.