17 Body Parts You Didn't Know Had A Name
10. Frenum
You actually have more than one frenum, or frenulum, on you body. It's that little bit of connective tissue that restricts movement of a body part, including you tongue and you upper lip.
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Men also have one on their penis. This can snap horribly during sex and is also a popular piercing spot, so don't google it at work unless you want a lot of pierced and/or injured willies to explain away to your boss.
9. Tragus
The tragus is that little triangle of cartilage that you can use to block your ears if you push it.
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Aside from being being, like the frenum, a popular part of the body to pierce, we're not entirely sure what it does, or if it does anything at all. It could be that it plays a role in detecting the direction of sounds.