Riddle of the Day

[Gizmokid2005]

I am found on the lips of some sisters and some brothers,
I'm accepted by some and cut off by others.
What am I?

ANSWER (Congrats cauzomb!): Mustache.

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NEXT RIDDLE:

Only one color, but not one size
Stuck to the bottom, yet easily flies
Present in sun, but not in rain
Doing no harm, and feeling no pain.

What am I?