My wife has large breasts with soft, smooth areolas about 3 1/2 inches across. Her nipples are normally flat, or nearly flat, and soft. After rubbing her breasts with a towel or taking off a bra, they get semi-erect for a short time. If I brush against them with my fingers, lips, or tongue, her nipples grow a little, but soften again if I stop. If I suck or squeeze harder, they get harder. When I'm licking her clitoral area, I can watch her nipples grow. As she becomes aroused, they fluctuate, lengthening one minute and softening the next. During orgasm, her nipples become extremely hard and erect, and the wide, soft areolas shrink tightly around the nipple bases, crinkly and hard. Their color darkens. There is no other circumstance that makes them as long and firm as during orgasm. A minute or so after, her areolas relax to their soft width, and the nipples once again become soft and flat. Their color returns to light pinkish-tan.

+rep friendly swearer