Riddle of the Day

[Gizmokid2005]

Many many keys I have, but no door do I unlock.
No mouth, but yet an enchanting voice
And yet, I never,ever talk.
What am I?

ANSWER (Congrats cauzomb): A piano.

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NEXT RIDDLE (should be an easy one):

A strange attraction compels me to hold things, yet I feel no warmth or love. My friends and I stick together unless one faces me - and then he is pushed away. What am I?