We’ve all got a pretty firm handle on our breasts...but how much do we know about our nipples? Accessorizing our breasts or nourishing our babies, these little brown adornments can sometimes have a mind of their own and bring out the giggles in the best of us.

Also called nips or teats, the nipple has, of course, picked up a few nicknames that are sure to amuse:

• Tit toppers
• Chest berries
• Hooter handles
• Boob bumps
• Puppy noses
• Tit tips

If you didn’t know some of those, you may be in the dark about some other interesting tit-bits of nipple information.

Did you know…

There are 4 types of nipples. Nipples are classified as flat, protruding, inverted, and unclassified. All are normal, as is having one protruding and one inverted.

You can be born without nipples. It’s a rare congenital condition called athelia and can typically be addressed through reconstructive surgery.

You can be born with extra nipples. Often called the third nipple, these supernumerary nipples have presented with as many as seven extra non-mammary nips. They’re more common in men and occur in about 200,000 Americans.

Nipples and areolas are not the same thing. The nipple sits at the very center of the round areola and connects to the mammary gland to dispense milk.

Nipples are as tall as ladybugs. The average height is about .9 centimeters, which is about as tall as a ladybug. That’s kinda cute!

Nipple hair is for real. How could it not be when those little bumps that surround the nipple are hair follicles. Don’t freak out, these hairs can be trimmed, tweezed, and waxed, too. Don’t know about shaving, though!

Nipples get darker for several reasons. The 50 shades of nipple brown change due to a number of different stimuli and circumstances, like temperature, seasons, pregnancy, arousal, and menstruation.

Nipples get hard for several reasons. Even when it’s not a tit-bit nipply outside, it’s still possible for nipples to become erect. Ovulation, allergy to soaps or lotions, pregnancy, breastfeeding, and arousal are all enough to make your nipples feel hard enough to cut glass.