State the Obvious

[GemEncrustedEarth]

you also need your feet to walk  

[Different...Very.]

I have toes on my feet, ya know.  

[GemEncrustedEarth]

You have to clip your toenails on occassion.  

[Different...Very.]

(I haven't done that in a while xd Can't find a clipper! gonk )
Your toenails get shorter when you clip them.  

[GoldenFraggle]

People also clip their fingernails  

[mamejen]

nails have no feeling.  

[goddessofforever]

Nail biting is a common habit among people.  

[hasbeenhacked102]

People bite their nails with their teeth.  

[mamejen]

most people brush their teeth.  

[jsuc]

people who dont brush their teeth have bad breath...  

[Animekitty47]

People who don't brush their teeth have icky teeth.  

[GemEncrustedEarth]

icky teeth normally appear yellow at first  

[mamejen]

then they turn brown.  

[GemEncrustedEarth]

Teeth eventually rot if not taken care of properly.